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Chapter 21: Q5. (page 532)

The viral ________ play(s) a role in attaching a virion to the host cell.

a. core

b. capsid

c. envelope

d. both b and c

Short Answer

Expert verified

The viral capsid and envelope are involved in the virion's attachment to the host cell.

Step by step solution

01

Content Introduction

Viruses have plenty of shapes and sizes. They differ in terms of structure, replication mechanisms, and target hosts. Viruses infect nearly all forms of life, from bacteria and archaea to eukaryotes including plants, animals, and fungi.

02

Content Explanation

The viral envelope contains glycoproteins that are used to bind to host cells. Viruses with envelopes produce diseases such as chicken pox, influenza, and mumps. Due to the fragility of the envelope, non-enclosed viruses are more resistant to temperature, pH, and certain disinfectants than enveloped viruses.

A capsid is a protective coating of proteins that surrounds the nucleic acid genome of all virions. Some viral capsids have a simple polyhedral "sphere" structure, whereas others have a more complicated shape.

03

Final Answer

The correct option is D.

The viral capsid and envelope play(s) a role in attaching a virion to the host cell.

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Most popular questions from this chapter

Influenza virus is packaged in a viral envelope that fuses with the plasma membrane. This way, the virus can exit the host cell without killing it. What advantage does the virus gain by keeping the host cell alive?

Why can鈥檛 dogs catch the measles?

Why is immunization after being bitten by a rabid animal so effective and why aren鈥檛 people vaccinated for rabies like dogs and cats are?

Which statement is true of viral replication?

a. In the process of apoptosis, the cell survives.

b. During attachment, the virus attaches at specific sites on the cell surface.

c. The viral capsid helps the host cell produce more copies of the viral genome.

d. mRNA works outside of the host cell to produce enzymes and proteins.

People with the CCR5螖32mutation of a T-cell surface protein can be exposed to some strains ofHIV-1without becoming sick. What step of the virus life cycle is likely to be inhibited with this mutation?

a. Release

b. Reverse transcription

c. Uncoating

d. Attachment
See all solutions

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