Use the following information to answer the question.
Poliovirus is an RNA virus of the picornavirus group, which uses its RNA as mRNA. At its 5 ' end, the RNA genome has a viral protein (VPg) instead of a 5 ' cap. This is followed by a nontranslated leader sequence, and then a single long protein-coding region ≈ 7,000 nucleotides), followed by a poly-A tail. Observations were made that used radioactive amino acids similar in structure to those that are found in viruses and other organisms. 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.

Question

23-08-2022
Biology

Answered

Use the following information to answer the question.
Poliovirus is an RNA virus of the picornavirus group, which uses its RNA as mRNA. At its 5 ' end, the RNA genome has a viral protein (VPg) instead of a 5 ' cap. This is followed by a nontranslated leader sequence, and then a single long protein-coding region ≈ 7,000 nucleotides), followed by a poly-A tail. Observations were made that used radioactive amino acids similar in structure to those that are found in viruses and other organisms. 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 :

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shalvivt shalvivt · Answer 1 · 2022-08-30T05:26:25-04:00

The conclusion is most consistent with the results of the radioactive labeling experiment is the RNA is translated into short polypeptides, which are subsequently assembled into large ones. Thus, option C is correct.

What is virus?

A virus is a microscopic organism that causes serious diseases and they are only active and alive when they enter into host body.

The structure of virus is very simple and the virion contains single molecule of nucleic acid which is covered by a coat of protein known as capsid.

The viruses may contain DNA or RNA any one of them. They never contain both DNA as well as RNA and its nucleic acid is either single stranded or double stranded.

Therefore,conclusion is most consistent with the results of the radioactive labeling experiment is the RNA is translated into short polypeptides, which are subsequently assembled into large ones. Thus, option C is correct.

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