Question Detail

MIC 121 GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES Objective Question
Take CBT

Question

What defines a single-stranded viral RNA genome as having 'positive polarity'?
Options
A It is complementary to messenger RNA (antisense) and cannot be directly used for protein synthesis.
B It is messenger RNA (mRNA) sense and can directly serve as a template for protein synthesis.
Correct Answer
C It is double-stranded and therefore has both positive and negative strands.
D It must first be converted into DNA before protein synthesis can occur.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The text clarifies, 'Single-stranded viral RNA genomes are further divided into 'positive polarity' (messenger RNA sense, which can serve as a template for protein synthesis)...'

Hint

Think about how RNA is typically used in a cell to make proteins.

Question Info

Course: MIC 121
Topic: GENERAL CHARACTERISTICS AND STRUCTURE OF VIRUSES
Type: Objective
Difficulty: Not specified
Question 143 of 984
Previous Course Details Next