datavorous/entrance-exam-dataset huggingface dataset:
Select the correct option(s) from the following:

Options:
A Option A
B Option B
C Option C
D All of the above

The correct answer is:
All of the above

Solution:
Correct Option is : (D)
All of the above

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Select the correct order about melting point from the following.

Options:
A TAgAu< TCu
B TCuAg< TAu
C TAuAgCu
D TCuAuAg

The correct answer is:
TAgAu< TCu

Solution:
Correct Option is : 1
TAgAu< TCu

Topic: Chemistry, d and f Block Elements, NEET
Select the correct order for the given properties–
(I) Thermal Stability: BaSO4>SrSO4>CaSO4>MgSO4
(II) Basic Nature: ZnO>BeO>MgO>CaO
(III) Solubility in water: LiOH>NaOH>KOH>RbOH
(IV) Melting point: NaCl>KCl>RbCl>LiCl

Options:
A I, IV
B I, II and IV
C II, III
D All are correct

The correct answer is:
I, IV

Solution:
Basic nature = CaO>MgO>BeO>ZnO
Solubility order = LiOH<NaOH<KOH<RbOH
Melting point order NaCl>KCl>RbCl>LiCl

Topic: Chemistry, s Block Elements, NEET
Select the correct order in electric impulse.

Options:
A Dendrites → Cell body → Axon → Axon terminal → Synaptic knob
B Cell body → Dendrites → Axon → Axon terminal → Synaptic knob
C Cell body → Dendrites → Axon terminal → Axon → Synaptic knob → Axon
D Cell body → Dendrites → Axon terminal → Synaptic knob → Axon

The correct answer is:
Dendrites → Cell body → Axon → Axon terminal → Synaptic knob

Solution:
The correct order of involvement of the given parts of neuron in electrical impulse is- Dendrites → Cell body → Axon → Axon terminal → Synaptic knob.

Topic: Biology, Neural Control and Coordination, NEET
Select the correct order of endosperm types.

Options:
A A: Cellular, B: Helobial, C: Free nuclear
B A: Cellular, B: Free nuclear, C: Helobial
C A: Helobial, B: Free nuclear, C: Cellular
D A: Free nuclear, B: Cellular, C: Helobial

The correct answer is:
A: Helobial, B: Free nuclear, C: Cellular

Solution:
The order of endosperm types in the diagram is helobial, free nuclear and cellular. Helobial endosperm is formed due to the formation of a large micropylar and a small chalazal chamber by mitotic division in the primary endosperm mother cell.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Select the correct order of phyla on the basis of the number of species.

Options:
A Mollusca > Arthropoda > Chordata
B Arthropoda > Mollusca > Chordata > Aschelminthes
C Arthropoda > Chordata > Mollusca
D Arthropoda > Aschelminthes > Chordata

The correct answer is:
Arthropoda > Aschelminthes > Chordata

Solution:
Arthropoda is the largest phylum with more than 1.1 million species followed by Mollusca (90000+ species), Aschelminthes (80000+ species) and Chordata (60000+ species).

Topic: Biology, Animal Kingdom, NEET
Select the correct order of the following terms.

Options:
A Expiratory Capacity (EC) < Inspiratory Reserve Volume (IRV) < Tidal Volume (TV) < Residual Volume (RV)
B Tidal Volume (TV) < Residual Volume (RV) < Expiratory Capacity (EC) < Inspiratory Reserve Volume (IRV)
C Residual Volume (RV) < Expiratory Capacity (EC) < Tidal Volume (TV) < Inspiratory Reserve Volume (IRV)
D Tidal Volume (TV) < Residual Volume (RV) < Inspiratory Reserve Volume (IRV) < Expiratory Capacity (EC)

The correct answer is:
Tidal Volume (TV) < Residual Volume (RV) < Expiratory Capacity (EC) < Inspiratory Reserve Volume (IRV)

Solution:
Tidal Volume (TV) < Residual Volume (RV) < Expiratory Capacity (EC) < Inspiratory Reserve Volume (IRV).

Topic: Biology, Breathing and Exchange of Gases, NEET
Select the correct output Y

Options:
A A.B
B A+B
C A. B¯+B.A¯
D A.B + A¯.B¯

The correct answer is:
A. B¯+B.A¯

Solution:
Y=A.A.B¯¯.B.AB¯¯
=A.AB¯ + B. AB¯
=A. A¯.B¯+B. A¯+B¯
= A.B+B.A¯
It is XOR gate

Topic: Physics, Semiconductors, NEET
Select the correct pair for multiple and symbol of zeta .

Options:
A 1021, z
B 10-21, Z
C 1021, Z
D 10-21, z

The correct answer is:
1021, Z

Solution:
Correct Option is : 3
1021, Z

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Select the CORRECT pair from the following.

Options:
A Marginal placentation - China rose, Pea
B Parietal placentation - Mustard, Marigold
C Free central placentation - Dianthus, Primrose
D Basal placentation - Tomato, Lemon

The correct answer is:
Free central placentation - Dianthus, Primrose

Solution:
Placentation is the arrangement of the ovules in the ovary and their attachment to it. Placentation are of various type in the angiosperms - marginal, axile, central, parietal, basal, and free central. In marginal placentation, ovules are attached to the ridge formed on the ventral suture of the ovary. Pea plant has this arrangement.
In parietal, the ovules are attached to the inner wall or towards the periphery of the ovary, observed in mustard plant and even Argemone. Sunflower and marigold show basal placentation where the ovules are attached at the base of the ovary. Dianthus and Primrose display free-central placentation and in it the ovules are attached at the central axis of the ovary without any septa present like in axile pattern.

Topic: Biology, Morphology of Flowering Plants, NEET
Select the correct pairing.

Options:
A Chrysophytes - Slime moulds
B Red dinoflagellates - Gonyaulax
C Mycoplasma - Smallest eukaryote
D Anabaena - Mycobiont

The correct answer is:
Red dinoflagellates - Gonyaulax

Solution:
Chrysophytes include diatoms and golden algae (desmids). They are found in freshwater as well as in marine environments. They are microscopic and float passively in water currents (plankton). Most of them are photosynthetic. Mycoplasma is a prokaryotic organism that completely lacks a cell wall. They are the smallest living cells known and can survive without oxygen. Many mycoplasma are pathogenic in animals and plants. Anabaena is cyanobacteria which forms a symbiotic association with leaves of Azolla plant (Anabaena azollae) or roots of Cycas (Anabaena cycadae). It doesn't form lichens. Red dinoflagellates (Gonyaulax) undergo such rapid multiplication that they make the sea appear red (red tides). Toxins released by such large numbers may even kill other marine animals such as fishes.

Topic: Biology, Biological Classification, NEET
Select the correct pairing.

Options:
A Heart wall- Involuntary unstriated muscle
B Biceps of the upper arm – Voluntary unstriated muscle
C Abdominal wall – Involuntary striated muscle
D Iris – Involuntary unstriated muscle

The correct answer is:
Iris – Involuntary unstriated muscle

Solution:
Smooth muscles are plain, non-striated, involuntary, or unstriped muscles due to the absence of striations. These muscles occur in the walls of hollow internal organs, in capsules of lymph glands, spleen, etc., in iris and ciliary body of eyes, skin dermis, penis, and other accessory genitalia, etc.

Topic: Biology, Structural Organisation in Animals, NEET
Select the correct pairing.

Options:
A Amyloplast - Photosynthesis
B Centrosome - Enzymes of digestion
C Lysosomes - Synthesis of amino acids
D ER - Formation of new nuclear membrane

The correct answer is:
ER - Formation of new nuclear membrane

Solution:
Amyloplast is the site of storage of carbohydrates. The centrosome is responsible for the organization, and nucleation of microtubules while lysosome contains a digestive enzyme that is used to destroy invading viruses and bacteria.

Topic: Biology, Cell - The Unit of Life, NEET
Select the correct pairing.

Options:
A

A Micro organism	B Product

Aspergillus niger	Acetic acid

B

A Micro organism	B Product

Monascus purpureus	Statins

C

A Micro organism	B Product

Streptococcus	Cyclosporin A

D

A Micro organism	B Product

Methanogens	Cheese

The correct answer is:

A Micro organism	B Product

Monascus purpureus	Statins

Solution:
Microorganism	Product

Aspergillus niger	Citric acid

Acetobacter aceti	Acetic acid

Monascus purpureus	Statins: Blood cholesterol-lowering agents

Streptococcus	Clot buster

Trichoderma polysporum	Cyclosporin A

Methanogens	Biogas

Propionibacterium sharmanii, Penicillium roqueforti	Cheese

Topic: Biology, Microbes in Human Welfare, NEET
Select the correct polysaccharide for Cotton.

Options:
A Cellulose
B Starch
C Glycogen
D Chitin

The correct answer is:
Cellulose

Solution:
Cotton fibre has cellulose [more than 90%].

Topic: Biology, Biomolecules (B), NEET
Select the correct polysaccharide for Liver.

Options:
A Cellulose
B Starch
C Glycogen
D Chitin

The correct answer is:
Glycogen

Solution:
Polysaccharide for Liver is Glycogen.

Topic: Biology, Biomolecules (B), NEET
Select the correct polysaccharide for the exoskeleton of Cockroach.

Options:
A Cellulose
B Starch
C Glycogen
D Chitin

The correct answer is:
Chitin

Solution:
Chitin is a polysaccharide for the exoskeleton of Cockroach.

Topic: Biology, Biomolecules (B), NEET
Select the correct products of Krebs cycle with respect to the complete breakdown of two acetyl-CoA molecules.

Options:
A 6 NADH2; 2 FADH2â; 2 GTP
B 3 NADH2; 1 FADH2â; 1 GTP
C 8 NADH2; 2 FADH2â; 2 GTP
D 6 NADH2; 1 FADH2â; 2 GTP

The correct answer is:
6 NADH2; 2 FADH2â; 2 GTP

Solution:
During a breakdown of acetyl CoA through Krebs cycle, it produces 3 NADH2, 1 FADH2 and 1 GTP. Thus, for 2 rounds of Krebs cycle, it will produce 6 NADH2, 2 FADH2â and 2 GTP molecules.

Topic: Biology, Respiration in Plants, NEET
Select the correct relation between azimuthal quantum number (l) and magnetic quantum number (m)

Options:
A l=m-12
B m=l+2
C m=2l2+1
D l=2m+1

The correct answer is:
l=m-12

Solution:
m=-l→0→+l
Values of m=2l+1
l=m-12

Topic: Chemistry, Structure of Atom, NEET
Select the correct relation of excretory organs and their wastes.

Options:
A Skin - Water, Sweat ( salt, urea, lactic acid), Sebum (sterols, hydrocarbons etc.)
B Liver- Bilirubin, Biliverdin, cholesterol, vitamins and other drugs
C Lungs - CO₂ and H₂O
D All of these

The correct answer is:
All of these

Solution:
Skin secretes Water, Sweat ( salt, urea, lactic acid), Sebum sterols, hydrocarbons etc. Liver secretes Bilirubin, Biliverdin, cholesterol, vitamins and other drugs and Lungs secrete CO₂ and H₂O.

Topic: Biology, Excretory Products and their Elimination, NEET
Select the correct relation.

Options:
A Dialysis fluid = Plasma– nitrogenous wastes
B Urinary excretion = tubular reabsorption + tubular secretion
C Dialysis fluid = Plasma
D Urinary excretion = tubular reabsorption

The correct answer is:
Dialysis fluid = Plasma– nitrogenous wastes

Solution:
Dialysis fluid = Plasma– nitrogenous wastes Urinary excretion = tubular reabsorption + tubular secretion – Glomerular filtration

Topic: Biology, Excretory Products and their Elimination, NEET
Select the correct relationship from the following.

Options:
A GPP=NPP-R
B GPP=NPP+R
C NPP=GPP+R
D NPP-GPP=R

The correct answer is:
GPP=NPP+R

Solution:
Net primary-productivity (NPP) amount is obtained when respiration amount removed from GPP. Hence, NPP = GPP - R.
Therefore, GPP = NPP + R.

Topic: Biology, Ecosystem, NEET
Select the correct relative charge of Proton and neutron ?

Options:
A 1 ,1
B 1 , 0
C 0 , 1
D 0 , 0

The correct answer is:
1 , 0

Solution:
Correct Option is : 2
1 , 0

Topic: Chemistry, Structure of Atom, NEET
Select the correct route for the passage of sperms in male frogs.

Options:
A Testes → Bidder's canal → Kidney → Vasa efferentia → Urinogenital duct → Cloaca
B Testes → Vasa efferentia → Kidney → Seminal Vesicle → Urinogenital duct → Cloaca
C Testes → Vasa efferentia → Bidder's canal → Ureter → Cloaca
D Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca

The correct answer is:
Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca

Solution:
In the male frog, the sperms will move from Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2017
Select the correct sequence for transport of sperm cells in male reproductive system.

Options:
A Testis â Epididymis â Vasa efferentia â Rete testis â Inguinal Canal âÂ Urethra
B Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus
C Seminiferous tubules â Vasa efferentia â Epididymis â Inguinal Canal â Urethra
D Testis â Epididymis âÂ Vasa efferentia â Vas deferens â Ejaculatory duct â Inguinal Canal â Urethra â Urethral meatus

The correct answer is:
Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus

Solution:
The correct sequence of the pathway of sperm in male reproductive system is as follows:

Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens → Ejaculatory duct → Urethra → Urethral meatus

Topic: Biology, Human Reproduction, NEET, NEET 2019 (All India)
Select the correct sequence of A, B, C and D from the given figure of formed elements.

Options:
A Platelets, RBCs, Basophils, Eosinophil
B Eosinophil, RBCs, Basophils, Platelets
C RBCs, Platelets, Eosinophil, Basophils
D RBCs, Platelets, Basophils, Eosinophil

The correct answer is:
RBCs, Platelets, Eosinophil, Basophils

Solution:
A, B, C and D respectively are RBCs, Platelets, Eosinophil, Basophils

Topic: Biology, Body Fluids and Circulation, NEET
Select the correct sequence of A, B, C and D from the given figure of formed elements.

Options:
A Neutrophil, Monocyte, Basophils, Eosinophil
B Neutrophil, Monocyte, T lymphocyte, B lymphocyte
C Neutrophil, Monocyte, B lymphocyte, T lymphocyte
D None of the above

The correct answer is:
Neutrophil, Monocyte, T lymphocyte, B lymphocyte

Solution:
A, B, C and D respectively are Neutrophil, Monocyte, T lymphocyte, B lymphocyte

Topic: Biology, Body Fluids and Circulation, NEET
Select the CORRECT sequence of events with respect to the fungal sexual cycle.

Options:
A Karyogamy, plasmogamy and meiosis
B Meiosis, plasmogamy and karyogamy
C Plasmogamy, karyogamy and meiosis
D Meiosis, karyogamy and plasmogamy

The correct answer is:
Plasmogamy, karyogamy and meiosis

Solution:
Fungi are eukaryotic microorganisms and the study of fungi is called mycology. They are a heterotrophic organism that does not contain chlorophyll and obtains its nutrition by absorption. The sequence of events in the fungal sexual cycle is plasmogamy, karyogamy, and then meiosis. In plasmogamy, the cytoplasm of two cells fuses with each other. In karyogamy, nuclei of two cells fuse with each other result in the formation of the zygote that will be diploid. After the formation of the zygote, meiosis occurs. Meiosis is also called reduction division that makes haploid cells. Due to which haploid stage of fungi gets established.

Topic: Biology, Biological Classification, NEET
Select the correct sequence of events

Options:
A Gametogenesis $\rightarrow$ Gamete transfer $\rightarrow$ Syngamy $\rightarrow$ Zygote $\rightarrow$ Cell division (Cleavage) $\rightarrow$ Cell differentiation $\rightarrow$ Organogenesis
B Gametogenesis $\rightarrow$ Gamete transfer $\rightarrow$ Syngamy $\rightarrow$ Zygote $\rightarrow$ Cell divison (Cleavage) $\rightarrow$ Organogenesis $\rightarrow$ Cell differentiation
C Gametogenesis $\rightarrow$ Syngamy $\rightarrow$ Gamete transfer $\rightarrow$ Zygote $\rightarrow$ Cell division (Cleavage) $\rightarrow$ Cell differentiation $\rightarrow$ Organogenesis
D Gametogenesis $\rightarrow$ Gamete transfer $\rightarrow$ Syngamy $\rightarrow$ Zygote $\rightarrow$ Cell differentiation $\rightarrow$ Cell division (Cleavage) $\rightarrow$ Organogenesis

The correct answer is:
Gametogenesis $\rightarrow$ Gamete transfer $\rightarrow$ Syngamy $\rightarrow$ Zygote $\rightarrow$ Cell division (Cleavage) $\rightarrow$ Cell differentiation $\rightarrow$ Organogenesis

Solution:
The correct sequence of events are Gametogenesis (i.e. production of gametes) $\rightarrow$ Gamete transfer (i.e. movement of gamete at the site of fertilisation) $\rightarrow$ Syngamy (i.e. the fusion of gametes) $\rightarrow$ Zygote (i.e. a eukaryotic cell formed by fertilisation of gametes) $\rightarrow$ Cell division (cleavage) $\rightarrow$ Cell differentiation (i.e the process where a cell changes from one cell type to another) $\rightarrow$ Organogenesis (i.e. the process of formation of three germ layers).

Topic: Biology, Reproduction in Organisms, NEET, NEET 2019 (Odisha)
Select the CORRECT sequence of formation of given intermediates of Krebs' cycle.

Options:
A Succinate → Malate → Fumarate → OAA
B Fumarate → Succinate → Malate → OAA
C Succinate → Fumarate → Malate → OAA
D Malate → Fumarate → Succinate → OAA

The correct answer is:
Succinate → Fumarate → Malate → OAA

Solution:
Kreb's cycle which is also known as citric acid cycle is an amphibolic pathway occurring in all the living cells. It is a part of cellular respiratory process which is an energy yielding process. Its enzymatic reactions take place in the mitochondrial matrix. It is a process of redox reactions which begins with the formation of citrate from oxaloacetate and acetyl CoA. Citrate undergoes redox reactions to form several intermediates ultimately to form oxaloacetate which is one of the initial reactants of the cycle. Formation of succinate and fumarate is accompanied by formation of reduced NADH and FADH2 , which are then channelized through electron transport chain to form ATP.

Topic: Biology, Respiration in Plants, NEET
Select the correct sequence of steps involved in PCR during gene amplification.

Options:
A Denaturation, annealing, extension
B Denaturation, extension, annealing
C Extension, Denaturation, Annealing
D Annealing, extension, denaturation

The correct answer is:
Denaturation, annealing, extension

Solution:
PCR stands for polymerase chain reaction, in this reaction, multiple copies of the gene of interest is synthesized in vitro using two sets of primers and enzyme DNA polymerase. The enzyme extends the primers using the nucleotides provided in the reaction and the genomic DNA as template. It involves denaturation of the DNA, attachment of primers called annealing and extension by enzyme DNA polymerase.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Select the correct sequential steps regarding absorption of fatty acids and glycerol, in intestine.
(A) Micelles are reformed into small protein coated fat globules called chylomicrons.
(B) Micelles move into intestinal mucosa.
(C) Fatty acids and glycerol are incorporated into small droplets called micelles.
(D) Lacteals release the absorbed substances into blood stream.
(E) Chylomicrons are transported into lacteals.
Choose the correct answer from the options given below :

Options:
A $(C),(B),(A),(E),(D)$
B $(B), (C), (E), (A), (D)$
C $(A),(E),(B),(D),(C)$
D $(D), (E), (B), (C), (A)$

The correct answer is:
$(C),(B),(A),(E),(D)$

Solution:
Option (1) is the answer as it represents the correct sequential steps regarding absorption of fatty acid and glycerol, in intestine i.e;
(C) Fatty acid and glycerol are incorporated into small droplets called micelles
(B) Micelles move into intestinal mucosa
(A) Micelles are reformed into small protein coated fat globules called chylomicrons
(E) Chylomicrons are transported into lacteals
(D) Lacteals release the absorbed substances into blood stream. Other option (2), (3) are (4) are not representing a correct sequence for absorption of fatty acids and glycerol.

Topic: Biology, Digestion and Absorption, NEET, NEET 2023 (Manipur)
Select the correct set from the following statements with respect to the salient features of the human genome.

i. The human genome contains 3164.7 billion nucleotides.
ii. The function is unknown for over 50% of the discovered gene.
iii. Less than 20% of the genome code for proteins.
iv. Chromosome-1 has the most genes (2968) and Y has the fewest (231).
v. The total number of genes estimated is 30,000.

Options:
A ii, iv, v
B i, ii, iv
C i, iii, v
D i, iv, v

The correct answer is:
ii, iv, v

Solution:
Some of the salient observations drawn from human genome project are as follows:
(i)The human genome contains 3164.7 million nucleotide bases.
(ii)The average gene consists of 3000 bases, but sizes vary greatly, with the largest known human gene being dystrophin at 2.4 million bases.
(iii)The total number of genes is estimated at 30,000, much lower than previous estimates of 80,000 to 1,40,000 genes. Almost all (99.9%) nucleotide bases are exactly the same in all people.
(iv)The functions are unknown for over 50% of discovered genes.

Topic: Biology, Molecular Basis of Inheritance, NEET
Select the correct set of animals of class Mammalia.

Options:
A Lion, hippopotamus, penguin, bat
B Lion, bat, whale, ostrich
C Hippopotamus, penguin, whale, kangaroo
D Whale, bat, kangaroo, hippopotamus

The correct answer is:
Whale, bat, kangaroo, hippopotamus

Solution:
Class mammals belong to Superclass Tetrapods of Vertebrates. These animals are so called due to mammary glands. These animals are seen in all habitats. Example: whale is seen in water, Bat has aerial habitat while kangaroo and hippopotamus are land mammals.

Topic: Biology, Animal Kingdom, NEET
Select the correct set of animals that belongs to class Mammalia.

Options:
A Lion, hippopotamus, penguin, bat
B Lion, bat, whale, ostrich
C Hippopotamus, penguin, whale, kangaroo
D Whale, bat, kangaroo, hippopotamus

The correct answer is:
Whale, bat, kangaroo, hippopotamus

Solution:
Mammals are the warm-blooded vertebrates that are distinguished by the presence of hair, secretes milk for the nourishment of the young ones, and give birth to live young ones. Penguin and ostrich are birds, while whale, bat kangaroo, hippopotamus are mammals.

Topic: Biology, Animal Kingdom, NEET
Select the correct set of hormones secreted by labela and b.

Options:
A a and b both secrete catecholamines
B b secretes catecholamines
C a secrete catecholamines
D a secretes emergency hormones

The correct answer is:
b secretes catecholamines

Solution:
b is Adrenal medulla secretes two hormones called adrenaline or epinephrine and noradrenaline or norepinephrine. These are commonly called as catecholamines.

Topic: Biology, Chemical Coordination and Integration, NEET
Select the correct statement.

Options:
A A bud is present in the axil of petiole in both simple and compound leaf.
B Swollen leaf base occurs in Solanaceae
C Stem tendril occurs in pea
D Phylloclade is expanded petiole which becomes green and photosynthetic

The correct answer is:
A bud is present in the axil of petiole in both simple and compound leaf.

Solution:
A bud is present in the axil of petiole in simple leaf and compound leaf but not in the axil of leaflets in compound leaf. Swollen leaf base is present in members of the Fabaceae family. Leaf tendrils occur in pea. Phyllode is an expanded green photosynthetic petiole. Phylloclade is an expanded green photosynthetic stem.

Topic: Biology, Morphology of Flowering Plants, NEET
Select the correct statement.

Options:
A FAD is hydrogen acceptor when succinic acid is oxidised to malic acid.
B Oxygen acts a terminal electron acceptor in aerobic respiration.
C Cytochrome c and a₃ contains two copper centres.
D Respiration is a catabolic process only.

The correct answer is:
Oxygen acts a terminal electron acceptor in aerobic respiration.

Solution:
FAD is a hydrogen acceptor when succinic acid is oxidized to fumaric acid in Kreb's cycle. It is the only step in respiration where FAD is hydrogen acceptor. Respiration is an amphibolic process. Cytochrome c is a mobile carrier between complex 3 and 4 which consists of the only iron center, cytochrome a₃ contains two copper centers.
At the end of the electron transport chain, the 2 electrons, 2 protons (2H+), and (1/2) O2 (1 atom of oxygen) combine to form one molecule of water. In this way, oxygen is the terminal acceptor of electrons of the respiratory chain.

Topic: Biology, Respiration in Plants, NEET