name
stringclasses
12 values
year
stringclasses
2 values
category
stringclasses
6 values
qid
int32
1
235
qtext
stringlengths
5
1.24k
ra
int32
1
5
image
imagewidth (px)
319
773
answers
listlengths
5
5
Cuaderno_2013_1_B
2013
biology
105
In a pedigree of an autosomal dominant trait it is observed that:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "The trait appears more frequently in males." }, { "aid": 2, "atext": "The unaffected people do not transmit the trait." }, { "aid": 3, "atext": "The trait tends to skip generations." }, { "aid": 4, "atext": "The affected people have both affected parents." }, { "aid": 5, "atext": "The trait tends to appear in the progeny of related parents." } ]
Cuaderno_2013_1_B
2013
biology
106
In mitosis, the nuclear membrane disintegrates and spindle microtubules bind to the kinetochores in:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Cytokinesis" }, { "aid": 2, "atext": "Prometaphase." }, { "aid": 3, "atext": "Metaphase" }, { "aid": 4, "atext": "Interface." }, { "aid": 5, "atext": "Prophase." } ]
Cuaderno_2013_1_B
2013
biology
107
Has a dominant inheritance linked to the X chromosome the:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Duchenne muscular dystrophy." }, { "aid": 2, "atext": "Fabry disease." }, { "aid": 3, "atext": "Huntington's Korea." }, { "aid": 4, "atext": "Cystic fibrosis." }, { "aid": 5, "atext": "Rett syndrome." } ]
Cuaderno_2013_1_B
2013
biology
108
Has an autosomal dominant inheritance:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Alcaptonuria." }, { "aid": 2, "atext": "Huntington's Korea." }, { "aid": 3, "atext": "Rett syndrome." }, { "aid": 4, "atext": "Colour blindness." }, { "aid": 5, "atext": "Duchenne muscular dystrophy." } ]
Cuaderno_2013_1_B
2013
biology
109
The number of Barr corpuscles of the cells of a man with karyotype 48, XXXY is:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "two." }, { "aid": 2, "atext": "one." }, { "aid": 3, "atext": "0" }, { "aid": 4, "atext": "3." }, { "aid": 5, "atext": "Four." } ]
Cuaderno_2013_1_B
2013
biology
110
The type of epistasia that explains the 15: 1 dihybrid phenotypic ratio is:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Double dominant." }, { "aid": 2, "atext": "Simple recessive" }, { "aid": 3, "atext": "Recessive dominant double." }, { "aid": 4, "atext": "Double recessive" }, { "aid": 5, "atext": "Simple dominant." } ]
Cuaderno_2013_1_B
2013
biology
111
To calculate the number of different genotypes in any allelic series the formula is applied:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "(n-1) / 2." }, { "aid": 2, "atext": "n x (n + 1) / 2." }, { "aid": 3, "atext": "n x (n-1) / 2." }, { "aid": 4, "atext": "(n-1) x (n + 1) / 2." }, { "aid": 5, "atext": "(2n-1) / 2." } ]
Cuaderno_2013_1_B
2013
biology
112
The change corresponds to a change mutation:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "T → C." }, { "aid": 2, "atext": "A → T." }, { "aid": 3, "atext": "G → A." }, { "aid": 4, "atext": "C → T." }, { "aid": 5, "atext": "A → G." } ]
Cuaderno_2013_1_B
2013
biology
113
The order of the stages of the cell cycle is:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "S, G1, Mitosis, G2." }, { "aid": 2, "atext": "G2, G1, S, Mitosis." }, { "aid": 3, "atext": "G1, Mitosis, G2, S." }, { "aid": 4, "atext": "S, G0, Mitosis, G1." }, { "aid": 5, "atext": "G1, S, G2, Mitosis." } ]
Cuaderno_2013_1_B
2013
biology
114
How many chromosomes would a male with nulisomy have for chromosomes 17 and 18?
4
Not supported with pagination yet
[ { "aid": 1, "atext": "43" }, { "aid": 2, "atext": "Four. Five." }, { "aid": 3, "atext": "44" }, { "aid": 4, "atext": "42" }, { "aid": 5, "atext": "40" } ]
Cuaderno_2013_1_B
2013
biology
115
It is NOT associated with defects in DNA repair the:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Fanconi anemia." }, { "aid": 2, "atext": "Li-Fraumeni syndrome." }, { "aid": 3, "atext": "Bloom syndrome." }, { "aid": 4, "atext": "Xeroderma pigmentosa." }, { "aid": 5, "atext": "Sickle-cell anemia" } ]
Cuaderno_2013_1_B
2013
biology
116
The denaturing of proteins:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Alters the native conformation without affecting the biological activity." }, { "aid": 2, "atext": "It is always irreversible." }, { "aid": 3, "atext": "It can only be achieved by treatment with strong acids." }, { "aid": 4, "atext": "It does not affect the primary structure." }, { "aid": 5, "atext": "It produces the hydrolysis of the protein." } ]
Cuaderno_2013_1_B
2013
biology
117
In relation to the structure of proteins:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "All globular proteins have the same domains." }, { "aid": 2, "atext": "The tertiary structure is present only in oligomeric proteins." }, { "aid": 3, "atext": "Hemoglobin is the only protein that has a quaternary structure." }, { "aid": 4, "atext": "The protein domains are regions of compact folding that exert a certain function." }, { "aid": 5, "atext": "The tertiary and quaternary structures are maintained only by the peptide bonds." } ]
Cuaderno_2013_1_B
2013
biology
118
Regarding enzymatic cofactors:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "All enzymes are required to be active." }, { "aid": 2, "atext": "Its binding to the enzyme is always covalent." }, { "aid": 3, "atext": "There are no two enzymes that use the same cofactor." }, { "aid": 4, "atext": "They can be metal ions." }, { "aid": 5, "atext": "They only have structural function." } ]
Cuaderno_2013_1_B
2013
biology
119
In relation to enzymatic inhibition:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "An irreversible inhibitor causes the denaturation of the enzyme." }, { "aid": 2, "atext": "The competing inhibitors bind to the substrate of the reaction." }, { "aid": 3, "atext": "A non-competitive inhibitor does not need to bind to the enzyme to exert its activity." }, { "aid": 4, "atext": "All inhibitors modify Vmax." }, { "aid": 5, "atext": "A competitive inhibitor increases the value of Km." } ]
Cuaderno_2013_1_B
2013
biology
120
Sulfur contains the side chain of:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Lysine" }, { "aid": 2, "atext": "Tryptophan" }, { "aid": 3, "atext": "Cysteine" }, { "aid": 4, "atext": "Serina" }, { "aid": 5, "atext": "To the girl." } ]
Cuaderno_2013_1_B
2013
biology
121
It contains an imidazole group the side chain of:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Arginine" }, { "aid": 2, "atext": "Tyrosine" }, { "aid": 3, "atext": "Glutamine" }, { "aid": 4, "atext": "Histidine" }, { "aid": 5, "atext": "Lysine" } ]
Cuaderno_2013_1_B
2013
biology
122
The pentose phosphate pathway produces:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "NADH and acetyl-CoA." }, { "aid": 2, "atext": "NADPH and ribose-5-phosphate." }, { "aid": 3, "atext": "NADH and ribose-5-phosphate." }, { "aid": 4, "atext": "Urea." }, { "aid": 5, "atext": "Ribulose-1,5-bisphosphate." } ]
Cuaderno_2013_1_B
2013
biology
123
The oxygen we consume in the respiratory chain is transformed into:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Acetyl-CoA." }, { "aid": 2, "atext": "Carbon dioxide." }, { "aid": 3, "atext": "Carbon monoxide." }, { "aid": 4, "atext": "Water." }, { "aid": 5, "atext": "Carbonic acid." } ]
Cuaderno_2013_1_B
2013
biology
124
When an enzyme catalyzes a reaction:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "It is not modified and can be reused." }, { "aid": 2, "atext": "It does not change, but it loses its activity." }, { "aid": 3, "atext": "It always requires the participation of cofactors." }, { "aid": 4, "atext": "It denatures to facilitate bonding with the substrate." }, { "aid": 5, "atext": "It always requires energy." } ]
Cuaderno_2013_1_B
2013
biology
125
The maximum speed of an enzymatic reaction:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "It depends on the substrate concentration." }, { "aid": 2, "atext": "It depends on the enzyme concentration." }, { "aid": 3, "atext": "It doubles when duplicating the substrate concentration." }, { "aid": 4, "atext": "It is Km / 2." }, { "aid": 5, "atext": "It is the same for all enzymes." } ]
Cuaderno_2013_1_B
2013
biology
126
The ketone bodies:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "They are used by the liver to synthesize fatty acids." }, { "aid": 2, "atext": "They only form in conditions of good nutrition." }, { "aid": 3, "atext": "Its formation is especially active in skeletal muscle." }, { "aid": 4, "atext": "It is formed from acetyl-CoA." }, { "aid": 5, "atext": "They never give acetone." } ]
Cuaderno_2013_1_B
2013
biology
127
In general, allosteric enzymes:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "They link the effectors in the active center." }, { "aid": 2, "atext": "They form covalent bonds with their negative effectors." }, { "aid": 3, "atext": "They originate hyperbolic curves of speed before the concentration of substrate." }, { "aid": 4, "atext": "They change their conformation when they link effectors." }, { "aid": 5, "atext": "They are irreversibly modified when they are inhibited." } ]
Cuaderno_2013_1_B
2013
biology
128
It is completely oxidized in the citric acid cycle:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "-ketoglutarate." }, { "aid": 2, "atext": "Succinate" }, { "aid": 3, "atext": "Citrate." }, { "aid": 4, "atext": "Acetyl-CoA." }, { "aid": 5, "atext": "Oxalacetate." } ]
Cuaderno_2013_1_B
2013
biology
129
Animals can NOT synthesize glucose from:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Glycerol." }, { "aid": 2, "atext": "To the girl." }, { "aid": 3, "atext": "Palmitate" }, { "aid": 4, "atext": "Oxalacetate." }, { "aid": 5, "atext": "Lactate" } ]
Cuaderno_2013_1_B
2013
biology
130
Pyruvate carboxylase:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "It requires biotin." }, { "aid": 2, "atext": "Use a methyl group activated as a carbon source." }, { "aid": 3, "atext": "It catalyzes the production of acetyl-CoA and carbon dioxide." }, { "aid": 4, "atext": "It is activated in the muscle during the Cori cycle." }, { "aid": 5, "atext": "It is an intermediate of the citric acid cycle." } ]
Cuaderno_2013_1_B
2013
biology
131
The Cori cycle:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "It involves the synthesis and degradation of glycogen." }, { "aid": 2, "atext": "It does not imply the conversion of lactate into pyruvate." }, { "aid": 3, "atext": "It only takes place in the liver." }, { "aid": 4, "atext": "Oxidizes tricarboxylic acids." }, { "aid": 5, "atext": "It involves glycolysis and gluconeogenesis." } ]
Cuaderno_2013_1_B
2013
biology
132
It is activated when cyclic AMP joins the:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Adenylate cyclase." }, { "aid": 2, "atext": "Protein kinase A." }, { "aid": 3, "atext": "Glycogen phosphorylase kinase." }, { "aid": 4, "atext": "Pyruvate kinase." }, { "aid": 5, "atext": "Phosphofruct kinase 1." } ]
Cuaderno_2013_1_B
2013
biology
133
The enantiomers of a molecule are:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Very different in all its chemical and physical properties." }, { "aid": 2, "atext": "Superimposed mirror images." }, { "aid": 3, "atext": "Distinguishable by their optical activity." }, { "aid": 4, "atext": "The result of the cyclization of a molecule in different positions." }, { "aid": 5, "atext": "Interconvertible without rupture of covalent bonds." } ]
Cuaderno_2013_1_B
2013
biology
134
The forces that stabilize the alpha helix are:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Intra-chain hydrogen bridges parallel to the axis of the helix." }, { "aid": 2, "atext": "Disulfide bridges between methionines." }, { "aid": 3, "atext": "Hydrogen bridges between chains perpendicular to the axis of the helix." }, { "aid": 4, "atext": "Van der Waals forces among the radicals." }, { "aid": 5, "atext": "Links between lysine radicals." } ]
Cuaderno_2013_1_B
2013
biology
136
The phosphate groups of the nucleotides:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "They are stabilized by binding to divalent anions." }, { "aid": 2, "atext": "They form low-energy hydrolysis bonds." }, { "aid": 3, "atext": "They are called X, Y and Z as they move away from ribose." }, { "aid": 4, "atext": "They are attached to the C3' of the ribose." }, { "aid": 5, "atext": "They present negative charge." } ]
Cuaderno_2013_1_B
2013
biology
137
On the link between the nitrogenous base and the ribose of the nucleotides:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "The anomeric carbon of ribose is in alpha configuration." }, { "aid": 2, "atext": "It is an N-glycosidic bond." }, { "aid": 3, "atext": "It involves the C5' of the ribose." }, { "aid": 4, "atext": "It involves phosphate groups." }, { "aid": 5, "atext": "It is of a different nature for each nitrogenous base." } ]
Cuaderno_2013_1_B
2013
biology
138
The phosphodiester bond:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "It is formed by attack from a nitrogenous base to a phosphate." }, { "aid": 2, "atext": "It is formed using NMP as a substrate." }, { "aid": 3, "atext": "In its training PPi is consumed." }, { "aid": 4, "atext": "It involves an alpha phosphate of one nucleotide and an OH group of the ribose of another." }, { "aid": 5, "atext": "It does not need enzymatic catalysis." } ]
Cuaderno_2013_1_B
2013
biology
139
The tRNA-aminoacyl-transferases:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "They link the amino acid to the ribosome." }, { "aid": 2, "atext": "They bind the amino acid to the anticodon of the tRNA." }, { "aid": 3, "atext": "They are RNA polymerases." }, { "aid": 4, "atext": "They guarantee the fidelity of the translation." }, { "aid": 5, "atext": "They are not important in the translation." } ]
Cuaderno_2013_1_B
2013
biology
140
In the translation of prokaryotes, the first tRNA:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "It is introduced in site A." }, { "aid": 2, "atext": "Join a methylated amino acid." }, { "aid": 3, "atext": "It is accompanied by the IF2 factor." }, { "aid": 4, "atext": "It is paired with a UGA start codon." }, { "aid": 5, "atext": "Always join serina." } ]
Cuaderno_2013_1_B
2013
biology
141
On the synthesis of proteins it is correct to affirm that:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Start at the carboxyl end." }, { "aid": 2, "atext": "The mRNA is translated from the 5'-end to the 3'-end." }, { "aid": 3, "atext": "In eukaryotes it takes place in the nucleus." }, { "aid": 4, "atext": "The first subunit of the ribosome to bind to the mRNA is the largest." }, { "aid": 5, "atext": "It does not consume energy." } ]
Cuaderno_2013_1_B
2013
biology
142
In the Michaelis-Menten kinetics, when the values ​​of [s] are much lower (<1/100) than the value of Km:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "We are in saturation kinetics." }, { "aid": 2, "atext": "The kinetics is of order 1." }, { "aid": 3, "atext": "The Vo is the Vmax." }, { "aid": 4, "atext": "The speed is independent of the [s]." }, { "aid": 5, "atext": "That situation never occurs." } ]
Cuaderno_2013_1_B
2013
biology
143
Enzymatic regulation by phosphorylation:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "It is reversible." }, { "aid": 2, "atext": "It requires enzymes that directly introduce the Pi." }, { "aid": 3, "atext": "Introduce the Pi into acidic and basic amino acids." }, { "aid": 4, "atext": "Always activate enzymes." }, { "aid": 5, "atext": "It is carried out by phosphatases." } ]
Cuaderno_2013_1_B
2013
biology
145
Glycogenesis:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "It is a very active pathway in all tissues." }, { "aid": 2, "atext": "It is activated by insulin." }, { "aid": 3, "atext": "All their reactions occur in the mitochondria." }, { "aid": 4, "atext": "One of its substrates is ribose." }, { "aid": 5, "atext": "It is produced in the liver." } ]
Cuaderno_2013_1_B
2013
biology
146
In the urea cycle, the argininsuccinate:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "It generates fumarate and arginine by argininesuccinase." }, { "aid": 2, "atext": "It has five amino groups in its structure." }, { "aid": 3, "atext": "Its synthesis produces energy in the form of ATP." }, { "aid": 4, "atext": "It is synthesized in the mitochondria." }, { "aid": 5, "atext": "It is a keto acid." } ]
Cuaderno_2013_1_B
2013
biology
148
Acetyl-CoA carboxylase:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "It is a mitochondrial enzyme." }, { "aid": 2, "atext": "Its product is Succinyl-CoA." }, { "aid": 3, "atext": "It requires biotin as a cofactor." }, { "aid": 4, "atext": "Free ATP" }, { "aid": 5, "atext": "Eat NADH." } ]
Cuaderno_2013_1_B
2013
biology
149
Acetyl-CoA:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "It is synthesized from pyruvate in the eukaryotic cytoplasm." }, { "aid": 2, "atext": "It has a phosphate bond rich in energy." }, { "aid": 3, "atext": "Presents a guanine nucleotide in coenzyme A." }, { "aid": 4, "atext": "Activates pyruvate carboxylase and inhibits pyruvate dehydrogenase." }, { "aid": 5, "atext": "It easily crosses the mitochondrial inner membrane." } ]
Cuaderno_2013_1_B
2013
biology
150
In the regulation of glycogen metabolism by adrenaline:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Adenylate cyclase is inhibited." }, { "aid": 2, "atext": "Protein kinase A is inhibited through cAMP." }, { "aid": 3, "atext": "Glycogen synthetase is inhibited by phosphorylation." }, { "aid": 4, "atext": "Glycogen phosphorylase is inhibited by phosphorylation." }, { "aid": 5, "atext": "The main enzyme that carries it out is protein kinase C." } ]
Cuaderno_2013_1_B
2013
biology
151
Diphyllobothrium latum competes with its definitive host for the vitamin:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "TO." }, { "aid": 2, "atext": "B 12" }, { "aid": 3, "atext": "C." }, { "aid": 4, "atext": "D." }, { "aid": 5, "atext": "AND." } ]
Cuaderno_2013_1_B
2013
biology
152
Miltefosine and meglumine antimonate are used against:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Plasmodium falciparum." }, { "aid": 2, "atext": "Entamoeba histolytica." }, { "aid": 3, "atext": "Fasciola hepatica." }, { "aid": 4, "atext": "Leishmania" }, { "aid": 5, "atext": "Trichinella spiralis." } ]
Cuaderno_2013_1_B
2013
biology
153
Praziquantel is indicated against:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Dicrocoelium dendriticum." }, { "aid": 2, "atext": "Plasmodium." }, { "aid": 3, "atext": "Taenia saginata." }, { "aid": 4, "atext": "Toxoplasma gondii." }, { "aid": 5, "atext": "Entamoeba histolytica." } ]
Cuaderno_2013_1_B
2013
biology
154
The eggs are operculated:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Hymenolepis nana." }, { "aid": 2, "atext": "Trichinella spiralis." }, { "aid": 3, "atext": "Enterobius vermicularis." }, { "aid": 4, "atext": "Fasciola hepatica." }, { "aid": 5, "atext": "Ascaris lumbricoides." } ]
Cuaderno_2013_1_B
2013
biology
155
Miracidium is a larval phase that is part of the biological cycle of a:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Pediculus" }, { "aid": 2, "atext": "Ascaris" }, { "aid": 3, "atext": "Oxiuro." }, { "aid": 4, "atext": "Fluke." }, { "aid": 5, "atext": "Phlebotomist" } ]
Cuaderno_2013_1_B
2013
biology
156
The transmission of hepatitis E virus is via:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Fecal-oral" }, { "aid": 2, "atext": "Body secretions." }, { "aid": 3, "atext": "Bloodline" }, { "aid": 4, "atext": "Placenta." }, { "aid": 5, "atext": "Aerial" } ]
Cuaderno_2013_1_B
2013
biology
157
The genetic material of parvoviruses is:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Double-stranded DNA" }, { "aid": 2, "atext": "Single chain DNA" }, { "aid": 3, "atext": "Single-stranded positive RNA" }, { "aid": 4, "atext": "Single negative chain RNA." }, { "aid": 5, "atext": "Double-stranded RNA" } ]
Cuaderno_2013_1_B
2013
biology
158
They have helical symmetry in their capsid the:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Rabies virus." }, { "aid": 2, "atext": "Common cold virus." }, { "aid": 3, "atext": "Papilomavirus." }, { "aid": 4, "atext": "Herpesvirus." }, { "aid": 5, "atext": "Adenovirus." } ]
Cuaderno_2013_1_B
2013
biology
159
The genome of the hepatitis B virus is DNA from:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Simple string (+)." }, { "aid": 2, "atext": "Simple string (-)." }, { "aid": 3, "atext": "Double circular chain." }, { "aid": 4, "atext": "Double linear chain." }, { "aid": 5, "atext": "Incomplete circular double chain (with notches)." } ]
Cuaderno_2013_1_B
2013
biology
160
The retrovirus envelope comes from (the):
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Plasma membrane." }, { "aid": 2, "atext": "Nuclear membrane." }, { "aid": 3, "atext": "Endoplasmic reticulum." }, { "aid": 4, "atext": "Golgi apparatus." }, { "aid": 5, "atext": "Mitochondria." } ]
Cuaderno_2013_1_B
2013
biology
161
The Baltimore system of virus classification is based on:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "The type of genetic material (DNA or RNA) they possess." }, { "aid": 2, "atext": "The morphology of their virions." }, { "aid": 3, "atext": "The replication of the genome and the synthesis process of its mRNA." }, { "aid": 4, "atext": "The symmetry of the capsid." }, { "aid": 5, "atext": "The presence or absence of wrapping." } ]
Cuaderno_2013_1_B
2013
biology
162
They cause diarrhea in children:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Togavirus." }, { "aid": 2, "atext": "Coronavirus." }, { "aid": 3, "atext": "Arenavirus." }, { "aid": 4, "atext": "Parvovirus." }, { "aid": 5, "atext": "Astrovirus" } ]
Cuaderno_2013_1_B
2013
biology
163
The bodies of Negri are masses of viral particles visible under an optical microscope in cells infected by the virus:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Smallpox" }, { "aid": 2, "atext": "Anger." }, { "aid": 3, "atext": "The polyoma." }, { "aid": 4, "atext": "Yellow fever" }, { "aid": 5, "atext": "Herpes" } ]
Cuaderno_2013_1_B
2013
biology
164
The antiviral tamiflu that is used against the bird flu virus acts:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Inhibiting viral neuraminidase." }, { "aid": 2, "atext": "Inactivating the viral protease responsible for the processing of capsomere precursors." }, { "aid": 3, "atext": "Preventing the decapsidation of viral particles." }, { "aid": 4, "atext": "Blocking the interaction of viral particles with their cellular receptor." }, { "aid": 5, "atext": "Altering the activity of the viral DNA polymerase." } ]
Cuaderno_2013_1_B
2013
biology
165
The genetic material of the influenza virus is replicated in the:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Lysosome" }, { "aid": 2, "atext": "Cellular cytoplasm." }, { "aid": 3, "atext": "Nucleus of the cell." }, { "aid": 4, "atext": "Endosome" }, { "aid": 5, "atext": "Golgi apparatus." } ]
Cuaderno_2013_1_B
2013
biology
166
Immediately after the herpes virus decapsidation takes place:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Synthesis of an own RNA polymerase." }, { "aid": 2, "atext": "Circularization of its genome." }, { "aid": 3, "atext": "Lysis of the endosome." }, { "aid": 4, "atext": "Transcription of the viral DNA polymerase." }, { "aid": 5, "atext": "Synthesis of a protein that inhibits the replication of the host cell." } ]
Cuaderno_2013_1_B
2013
biology
167
The common cold virus has a genome:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Single chain DNA" }, { "aid": 2, "atext": "Double-stranded DNA" }, { "aid": 3, "atext": "Fragmented." }, { "aid": 4, "atext": "Simple chain RNA" }, { "aid": 5, "atext": "Double-stranded RNA" } ]
Cuaderno_2013_1_B
2013
biology
168
The most important causative agents of cervical cancer are:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Papilomavirus." }, { "aid": 2, "atext": "Polyomavirus" }, { "aid": 3, "atext": "Retrovirus." }, { "aid": 4, "atext": "Cytomegalovirus." }, { "aid": 5, "atext": "Parvovirus." } ]
Cuaderno_2013_1_B
2013
biology
169
They use a reverse transcriptase during their replication:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Papovavirus." }, { "aid": 2, "atext": "Polyomavirus" }, { "aid": 3, "atext": "Hepadnavirus." }, { "aid": 4, "atext": "Parvovirus." }, { "aid": 5, "atext": "Herpesvirus." } ]
Cuaderno_2013_1_B
2013
biology
170
The virus (virusoid) of hepatitis D (agent δ) needs to co-infect with the hepatitis virus:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "TO." }, { "aid": 2, "atext": "B." }, { "aid": 3, "atext": "C." }, { "aid": 4, "atext": "AND." }, { "aid": 5, "atext": "G." } ]
Cuaderno_2013_1_B
2013
biology
171
Most Gram-positive bacteria do not grow in MacConkey's medium because it contains:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Bile salts and crystal violet." }, { "aid": 2, "atext": "Lactose and casein hydrolyzate." }, { "aid": 3, "atext": "Neutral red" }, { "aid": 4, "atext": "Mannitol" }, { "aid": 5, "atext": "Basic fuchsin" } ]
Cuaderno_2013_1_B
2013
biology
172
The immersion oil used for microscopic observation:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Protects the sample from the oxidizing effect of air." }, { "aid": 2, "atext": "Lubricate the objective lens." }, { "aid": 3, "atext": "Reduces refraction and increases resolution." }, { "aid": 4, "atext": "It acts as a lens that increases magnification." }, { "aid": 5, "atext": "Avoid dehydration of the preparation." } ]
Cuaderno_2013_1_B
2013
biology
173
To observe the bacterial capsules in a clear field microscope, a stain is made:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Resistant acid" }, { "aid": 2, "atext": "From Leifson." }, { "aid": 3, "atext": "Simple." }, { "aid": 4, "atext": "Negative." }, { "aid": 5, "atext": "Differential." } ]
Cuaderno_2013_1_B
2013
biology
174
The microbiocidal action of iodine and chlorine and many of its derivatives is due to:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "They are oxidizing agents." }, { "aid": 2, "atext": "They bind specifically to the active centers of the enzymes." }, { "aid": 3, "atext": "They bind specifically to ribosomal proteins." }, { "aid": 4, "atext": "They induce pores in the membranes." }, { "aid": 5, "atext": "They cause the dissolution of membrane phospholipids." } ]
Cuaderno_2013_1_B
2013
biology
175
The bacteria contain endotoxins:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Of all types except microplasmas." }, { "aid": 2, "atext": "Gram positive." }, { "aid": 3, "atext": "Gram negative" }, { "aid": 4, "atext": "Intracellular" }, { "aid": 5, "atext": "Endospore formers" } ]
Cuaderno_2013_1_B
2013
biology
176
The O antigen used in the classification of Gram negative bacteria corresponds to:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "The flagellar proteins." }, { "aid": 2, "atext": "Components of the capsule." }, { "aid": 3, "atext": "The peptidoglycan." }, { "aid": 4, "atext": "The polysaccharide of lipopolysaccharides." }, { "aid": 5, "atext": "Plasma membrane proteins." } ]
Cuaderno_2013_1_B
2013
biology
177
The alcohol-resistance acid is used to identify:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Fermenting bacteria." }, { "aid": 2, "atext": "Yeasts used in the production of alcoholic beverages." }, { "aid": 3, "atext": "Bacteria that possess mycolic acids." }, { "aid": 4, "atext": "Sporulated organisms." }, { "aid": 5, "atext": "Oxidizing organisms from sulfides to sulfuric acid." } ]
Cuaderno_2013_1_B
2013
biology
178
The Archaea differ from the bacteria in that:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Their membranes have a single phospholipid layer." }, { "aid": 2, "atext": "They have several chromosomes." }, { "aid": 3, "atext": "Their membranes have glycerol ethers." }, { "aid": 4, "atext": "They are not susceptible to viral infection." }, { "aid": 5, "atext": "They do not have a cell wall." } ]
Cuaderno_2013_1_B
2013
biology
179
Very commonly the autoinducer molecules responsible for the quorum perception of many Gram-negative bacteria are:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "N-acyl homoserine lactones." }, { "aid": 2, "atext": "Diaminopimelic acid." }, { "aid": 3, "atext": "Proteins" }, { "aid": 4, "atext": "Hills" }, { "aid": 5, "atext": "Fatty acids." } ]
Cuaderno_2013_1_B
2013
biology
180
The most commonly used data to study the phylogenetic relationship between bacteria is:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "The cytosine-guanine composition of their DNA." }, { "aid": 2, "atext": "The degree of DNA-DNA hybridization." }, { "aid": 3, "atext": "The amino acid sequence of ribosomal proteins." }, { "aid": 4, "atext": "The nucleotide sequence of 16S ribosomal RNA." }, { "aid": 5, "atext": "The composition of the cell wall." } ]
Cuaderno_2013_1_B
2013
biology
181
It usually protects the DNA of a restriction enzyme:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Methylation of a nitrogenous base." }, { "aid": 2, "atext": "Glycosylation of a nitrogenous base." }, { "aid": 3, "atext": "Acetylation of deoxyribose." }, { "aid": 4, "atext": "Phosphorylation of deoxyribose." }, { "aid": 5, "atext": "Loss of one of the hydroxyl groups of phosphate." } ]
Cuaderno_2013_1_B
2013
biology
182
An essential characteristic of plasmids is:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Be able to integrate into the genome of the host cell." }, { "aid": 2, "atext": "Direct the process of bacterial conjugation." }, { "aid": 3, "atext": "Carry genes for antibiotic resistance." }, { "aid": 4, "atext": "Replicate autonomously." }, { "aid": 5, "atext": "Being circular DNA molecules." } ]
Cuaderno_2013_1_B
2013
biology
183
The fermentation of glucose used by Escherichia coli is:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Lactic" }, { "aid": 2, "atext": "Propionic" }, { "aid": 3, "atext": "Alcoholic" }, { "aid": 4, "atext": "Butyric" }, { "aid": 5, "atext": "Acid-mixed." } ]
Cuaderno_2013_1_B
2013
biology
184
The target of the aminoglycoside antibacterials is the:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "DNA polymerase" }, { "aid": 2, "atext": "Transpeptidation of peptidoglycan." }, { "aid": 3, "atext": "30S subunit of the ribosome." }, { "aid": 4, "atext": "RNA polymerase" }, { "aid": 5, "atext": "DNA gyrase." } ]
Cuaderno_2013_1_B
2013
biology
185
In the synthesis of DNA, the quinolones act:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Joining the double helix and thus blocking the progress of the replication fork." }, { "aid": 2, "atext": "Interlacing in the double helix and thus causing errors in the transcription." }, { "aid": 3, "atext": "On DNA gyrase." }, { "aid": 4, "atext": "As nucleotide analogs that are incorporated into DNA." }, { "aid": 5, "atext": "About DNA polymerases." } ]
Cuaderno_2013_1_B
2013
biology
186
Isoniazid is effective against:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Brucella." }, { "aid": 2, "atext": "Mycoplasma." }, { "aid": 3, "atext": "Staphylococcus aureus." }, { "aid": 4, "atext": "Mycobacterium tuberculosis." }, { "aid": 5, "atext": "Bacillus anthracis." } ]
Cuaderno_2013_1_B
2013
biology
187
A difference between the genus Vibrio and the enterobacteria is to be:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Strict anaerobe." }, { "aid": 2, "atext": "Halophile." }, { "aid": 3, "atext": "Negative oxidase of peritric flogging." }, { "aid": 4, "atext": "Very demanding nutritionally." }, { "aid": 5, "atext": "Do not ferment glucose." } ]
Cuaderno_2013_1_B
2013
biology
189
Cause of syphilis:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Trichomonas vaginalis." }, { "aid": 2, "atext": "Neisseria gonorrhoeae." }, { "aid": 3, "atext": "Treponema pallidum." }, { "aid": 4, "atext": "Mycoplasma genitalium." }, { "aid": 5, "atext": "Mobiluncus curtisii." } ]
Cuaderno_2013_1_B
2013
biology
190
They incorporate sterols to their plasma membrane:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Mycobacterium tuberculosis." }, { "aid": 2, "atext": "Micrococcus luteus." }, { "aid": 3, "atext": "Mycoplasma pneumoniae" }, { "aid": 4, "atext": "Chlamydia trachomatis." }, { "aid": 5, "atext": "Rickettsia prowazekii." } ]
Cuaderno_2013_1_B
2013
biology
191
The vaginal microbiota of a healthy fertile woman is dominated by bacteria of the genus:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "Peptostreptococcus" }, { "aid": 2, "atext": "Bifidobacterium" }, { "aid": 3, "atext": "Eubacterium." }, { "aid": 4, "atext": "Lactobacillus" }, { "aid": 5, "atext": "Vagococcus" } ]
Cuaderno_2013_1_B
2013
biology
192
Lyme disease is caused by:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Borrelia burgdorferi." }, { "aid": 2, "atext": "Treponema saccharophilum." }, { "aid": 3, "atext": "Spirillum commune." }, { "aid": 4, "atext": "Leptospira interrogans." }, { "aid": 5, "atext": "Limulus polyphemus." } ]
Cuaderno_2013_1_B
2013
biology
193
The cholera toxin:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Inhibits protein synthesis." }, { "aid": 2, "atext": "It is hemolytic and dermonecrotic." }, { "aid": 3, "atext": "Alters the flow of electrolytes in the intestine." }, { "aid": 4, "atext": "It is formed by a single polypeptide that is cleaved by the effect of proteases." }, { "aid": 5, "atext": "It produces food poisoning." } ]
Cuaderno_2013_1_B
2013
biology
194
Botulinum toxin:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "It occurs in infected and poorly aerated wounds." }, { "aid": 2, "atext": "Blocks protein synthesis." }, { "aid": 3, "atext": "It blocks the secretion of acetylcholine in the myoneural plaque." }, { "aid": 4, "atext": "It interferes with nerve impulse transmission at the level of axons." }, { "aid": 5, "atext": "It causes necrosis of the nerve endings." } ]
Cuaderno_2013_1_B
2013
biology
195
An important test to distinguish Staphylococcus aureus from saprophytic staphylococci, such as Staphylococcus epidermidis is:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Oxidase" }, { "aid": 2, "atext": "Catalase" }, { "aid": 3, "atext": "Indole." }, { "aid": 4, "atext": "Urea" }, { "aid": 5, "atext": "Coagulase" } ]
Cuaderno_2013_1_B
2013
biology
196
Pseudomonas aeruginosa is typically:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "Sensitive to most antibiotics used in human medicine." }, { "aid": 2, "atext": "Pathogen obligated." }, { "aid": 3, "atext": "Opportunistic pathogen." }, { "aid": 4, "atext": "Commensal bacteria of the digestive tract." }, { "aid": 5, "atext": "Intracellular pathogen." } ]
Cuaderno_2013_1_B
2013
biology
197
Infections caused by Clostridium tetani, Bordetella pertussis, Corynebacterium diphtheriae and Vibrio cholerae have in common:
3
Not supported with pagination yet
[ { "aid": 1, "atext": "The type of transmission." }, { "aid": 2, "atext": "The reservoir." }, { "aid": 3, "atext": "The production of exotoxins." }, { "aid": 4, "atext": "The affected organs." }, { "aid": 5, "atext": "The route of infection." } ]
Cuaderno_2013_1_B
2013
biology
198
The main virulence factor of Streptococcus pneumoniae is one (one):
2
Not supported with pagination yet
[ { "aid": 1, "atext": "Fímbria." }, { "aid": 2, "atext": "Capsule." }, { "aid": 3, "atext": "Scourge" }, { "aid": 4, "atext": "Endotoxin" }, { "aid": 5, "atext": "Adhesin" } ]
Cuaderno_2013_1_B
2013
biology
199
Legionella pneumophila is transmitted by:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Air conditioning systems." }, { "aid": 2, "atext": "Contact between individuals." }, { "aid": 3, "atext": "Mosquito bite." }, { "aid": 4, "atext": "Contaminated food." }, { "aid": 5, "atext": "Fecal-oral route." } ]
Cuaderno_2013_1_B
2013
biology
200
It contains a Gram negative species that causes meningitis the genus:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Trichomonas." }, { "aid": 2, "atext": "Pasteurella" }, { "aid": 3, "atext": "Burkholderia." }, { "aid": 4, "atext": "Francisella." }, { "aid": 5, "atext": "Neisseria." } ]
Cuaderno_2013_1_B
2013
biology
201
In mammals, Toll-like receptors (TLRs) are receptors:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Signaling." }, { "aid": 2, "atext": "Antigenic" }, { "aid": 3, "atext": "Of histocompatibility alleles." }, { "aid": 4, "atext": "Of phagocytosis." }, { "aid": 5, "atext": "Of chemokines." } ]
Cuaderno_2013_1_B
2013
biology
202
The innate immune response to viruses is mainly mediated by lymphocytes:
4
Not supported with pagination yet
[ { "aid": 1, "atext": "B1" }, { "aid": 2, "atext": "Th1." }, { "aid": 3, "atext": "Cytolytic T" }, { "aid": 4, "atext": "NK" }, { "aid": 5, "atext": "Tγδ." } ]
Cuaderno_2013_1_B
2013
biology
203
The main function of chemokines is:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Regulate lymphocyte traffic." }, { "aid": 2, "atext": "Stimulate cell proliferation in response to chemical agents." }, { "aid": 3, "atext": "Amplify the production of antiviral cytokines." }, { "aid": 4, "atext": "Regulate the selection in the thymus." }, { "aid": 5, "atext": "Antagonize some cytokines." } ]
Cuaderno_2013_1_B
2013
biology
204
Interactions between selectins and vascular targeins:
2
Not supported with pagination yet
[ { "aid": 1, "atext": "They are very strong." }, { "aid": 2, "atext": "They mediate the first phase of the leukocyte / endothelium adhesion." }, { "aid": 3, "atext": "They are permanent." }, { "aid": 4, "atext": "They mediate firm adhesion to the endothelium." }, { "aid": 5, "atext": "They are very intense in the spleen." } ]
Cuaderno_2013_1_B
2013
biology
205
In the processing and presentation of peptides of extracellular origin intervene (n):
3
Not supported with pagination yet
[ { "aid": 1, "atext": "The TAP proteins." }, { "aid": 2, "atext": "The tapasina." }, { "aid": 3, "atext": "The HLA-DM molecule." }, { "aid": 4, "atext": "The proteosome." }, { "aid": 5, "atext": "The HLA-B molecules." } ]
Cuaderno_2013_1_B
2013
biology
206
The main autocrine growth factor for most T lymphocytes after antigen recognition is:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "Interleukin 2" }, { "aid": 2, "atext": "Interleukin 4" }, { "aid": 3, "atext": "Interleukin 10" }, { "aid": 4, "atext": "TGF-beta." }, { "aid": 5, "atext": "All the previous ones" } ]
Cuaderno_2013_1_B
2013
biology
207
Tα CD4 + lymphocytes:
1
Not supported with pagination yet
[ { "aid": 1, "atext": "They are functionally cooperative with B lymphocytes and other T lymphocytes." }, { "aid": 2, "atext": "They recognize native antigens in soluble form." }, { "aid": 3, "atext": "They recognize peptides in the MHC class I context." }, { "aid": 4, "atext": "They are less abundant than CD8 + in human blood." }, { "aid": 5, "atext": "They release perforins." } ]
Cuaderno_2013_1_B
2013
biology
208
It is more characteristic of Th1 than Th2 lymphocytes:
5
Not supported with pagination yet
[ { "aid": 1, "atext": "Interleukin 5" }, { "aid": 2, "atext": "The TGF-beta." }, { "aid": 3, "atext": "Interleukin 10" }, { "aid": 4, "atext": "Interleukin 17" }, { "aid": 5, "atext": "The IFN-γ." } ]