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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 20, Problem 2SQ
Textbook Problem
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The capsid of a virion consists of ___ .

  1. a. DNA
  2. b. RNA
  3. c. protein
  4. d. lipids

Summary Introduction

Introduction: A capsid is a protective unit that covers and protects the genetic material or genome of the viruses. Some viruses contain only genetic material coated by capsid (naked or non enveloped virus), while others contain a protective layer made of lipid bilayer around the capsid (enveloped viruses). Capsids are made up of small subunits of proteins called as capsomers.

Explanation of Solution

Reason for correct answer:

The virions or the viral particles have a protective unit over their nucleic acid made up of a protein called as capsid.

Option c. is given as “protein”. Capsids are the protein coat around the nucleic acids that protects the genetic material from digestive enzymes, capsomere help to attach, and penetrate the virus into the host cells.

Hence, the correct answer is option c.

Reasons for incorrect answer:

Option a. is given as “DNA”. DNA is the nucleic acids that can act as a genetic material in DNA viruses. The proteins are coated over the genetic material for their protection.

Hence, the correct answer is option a...

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