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MIC 121 GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES Objective Question
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Question

Which statement accurately describes a characteristic of viral RNA genomes as presented in the document?
Options
A All single-stranded viral RNA genomes can directly serve as a template for protein synthesis.
B "Negative polarity" ssRNA is complementary to messenger RNA sense and cannot be directly used for protein synthesis.
Correct Answer
C All double-stranded RNA genomes are linear in structure.
D A single species of virus can contain both DNA and RNA genomes.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The document specifies that single-stranded viral RNA genomes are divided into "positive polarity" (mRNA sense, which can serve as a template for protein synthesis) and "negative polarity," or antisense (complementary to mRNA sense, which cannot be directly used as a template for protein synthesis). It also states a single species of virus will never contain both DNA and RNA.

Hint

Consider the different 'polarities' of single-stranded RNA genomes.

Question Info

Course: MIC 121
Topic: GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES
Type: Objective
Difficulty: Not specified
Question 106 of 984
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