A problem with the action or production of this substance leads to both type I and type II diabetes mellitus.
A. glucagon
B. cortisol
C. thyroid hormone
D. insulin
E. growth hormone
Answer: D
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Poliovirus is an RNA virus of the picornavirus group, which uses its RNA as mRNA. At its end, the RNA genome has a viral protein (VPg) instead of a cap
This is followed by a nontranslated leader sequence, and then a single long protein-coding region (~7000 nucleotides), followed by a poly-A tail. Observations were made that used radioactive amino acid analogues. Short period use of the radioactive amino acids result in labeling of only very long proteins, while longer periods of labeling result in several different short polypeptides. What conclusion is most consistent with the results of the radioactive labeling experiment? A) Host cell ribosomes only translate the viral code into short polypeptides. B) The RNA is only translated into a single long polypeptide, which is then cleaved into shorter ones. C) The RNA is translated into short polypeptides, which are subsequently assembled into large ones. D) The large radioactive polypeptides are coded by the host, whereas the short ones are coded for by the virus.
Answer the following statements true (T) or false (F)
1. Researchers can readily extract DNA from one organism and merge that DNA into another organism, applying genetic engineering as a possible cure to cancer or muscular dystrophy and other diseases. The scientific method can test a hypothesis to determine if this approach is morally right or wrong.
2. In this experiment, if the scientists giving the placebo (low, medium, or high vaccine doses) did not know which dose they were administering, then this would be an example of a double-blind experiment.
3. A theory is an advanced hypothesis that has been proven to be true.
4.
These glucose and fructose molecules will bond to form a monosaccharide with the removal of water.
5. The property of water demonstrated by a water strider, as it remains on top of the water, is that water molecules are held together by ionic bonds.
In his analysis of rII in phage, Benzer assayed complementation
Suppose you try your hand at this with several mutants and get the following results (+ = complementation): 42 and 62 + 42 and 83 – 62 and 63 – 62 and 74 + 42 and 74 – 42 and 75 + 62 and 75 – Mutation 42 has previously been shown to be in a different gene than mutation 62. What can you conclude? A) Mutations 42 and 75 are in the same gene. B) Mutations 62 and 74 are in the same gene. C) Mutations 62, 63, and 74 are in the same gene. D) Mutations 42 and 74 are in the same gene. E) Mutation 63 is not in the same gene as either 62 or 42.
What is a virion?
A) a virus genome inside a cell B) an empty capsid C) a single virus particle outside a cell D) an extracellular virus genome E) a virus genome integrated into a host cell genome