Problem: OPTIONS:
- dna analysis
- proteins analysis
- residues analysis
- rna analysis
Q: Answer the following question given this paragraph: RNA analysis is performed to study gene expression patterns in cells. RNA is naturally very unstable because RNAses are commonly present in nature and very difficult to inactivate. Similar to DNA, RNA extraction involves the use of various buffers and enzymes to inactivate macromolecules and preserve the RNA. Gel Electrophoresis Because nucleic acids are negatively charged ions at neutral or basic pH in an aqueous environment, they can be mobilized by an electric field. Gel electrophoresis is a technique used to separate molecules on the basis of size, using this charge. The nucleic acids can be separated as whole chromosomes or fragments. The nucleic acids are loaded into a slot near the negative electrode of a semisolid, porous gel matrix and pulled toward the positive electrode at the opposite end of the gel. Smaller molecules move through the pores in the gel faster than larger molecules; this difference in the rate of migration separates the fragments on the basis of size. There are molecular weight standard samples that can be run alongside the molecules to provide a size comparison. Nucleic acids in a gel matrix can be observed using various fluorescent or colored dyes. Distinct nucleic acid fragments appear as bands at specific distances from the top of the gel (the negative electrode end) on the basis of their size (Figure 17.4). A mixture of genomic DNA fragments of varying sizes appear as a long smear, whereas uncut genomic DNA is usually too large to run through the gel and forms a single large band at the top of the gel. Q: What type of analysis is performed to study gene expression patterns in cells? A:
Answer: rna analysis

Problem:OPTIONS:
- carnivorous
- asexual
- symbiotic
- aquatic

Answer the following question given this paragraph: Many structures in fish are adaptations for their aquatic lifestyle. Several are described below and shown in Figure below . Q: Many structures in fish are adaptations for what type of lifestyle? A:
****
A: aquatic

Answer the following question given this paragraph: A metal is an element that is a good conductor of heat and electricity. Metals are also malleable, which means that they can be hammered into very thin sheets without breaking, and ductile, which means that they can be drawn into wires. When a fresh surface of any metal is exposed, it will be very shiny, because it reflects light well. This property is referred to as luster. All metals are solid at room temperature except mercury (Hg), which is a liquid. The melting points of different metals vary widely. Mercury has the lowest melting point of all pure metals (39C), and tungsten (W) has the highest (3422C). On the periodic table in Figure above , the metals are shaded blue and are located to the left of the bold stair-step line. About 80 percent of the elements are metals (see examples in Figure below ). Q: Which metal is not a solid even at room temperature? A:
OPTIONS:
- iron
- copper
- aluminum
- mercury
mercury

Answer the following question given this paragraph: Properties of nonmetals include a relatively low boiling point, so many nonmetals are gases. Nonmetals are also poor conductors of heat, and solid nonmetals are dull and brittle. Q: What type of boiling point do nonmetals normally have? A:
OPTIONS:
- even
- high
- odd
- low

Answer: low

Question: Answer the following question given this paragraph: A more crucial use of RC circuits for timing purposes is in the artificial pacemaker, used to control heart rate. The heart rate is normally controlled by electrical signals generated by the sino-atrial (SA) node, which is on the wall of the right atrium chamber. This causes the muscles to contract and pump blood. Sometimes the heart rhythm is abnormal and the heartbeat is too high or too low. The artificial pacemaker is inserted near the heart to provide electrical signals to the heart when needed with the appropriate time constant. Pacemakers have sensors that detect body motion and breathing to increase the heart rate during exercise to meet the body's increased needs for blood and oxygen. Q: A more crucial use of rc circuits for timing purposes is in the artificial pacemaker, used to control what? A:
OPTIONS:
- breathing rate
- blood pressure
- iron levels
- heart rate
Answer: heart rate

input: OPTIONS:
- percent solution
- saline sollution
- share solution
- stock solution Now, answer this question: Answer the following question given this paragraph: Another common dilution problem involves deciding how much of a highly concentrated solution is requires to make a desired quantity of solution of lesser concentration. The highly concentrated solution is typically referred to as the stock solution. Q: What is a high concentrated solution typically referred to as? A:
A:
output:
stock solution