AnswersBiology - SC3209 ICViruses

Viruses Answers

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Use your understanding of viruses to answer the following questions. Viruses are considered to be living.nonliving.

A
living.
B
nonliving.
2
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viruscellsmallest unit of life

A
virus
B
cell
3

viruscellhijacks host in order to reproduce

A
virus
B
cell
4

viruscellcontains DNA, ribosomes, and cytoplasm

A
virus
B
cell
5

viruscellable to grow and reproduce on its own

A
virus
B
cell
6

viruscellcontains nucleic acid and capsid

A
virus
B
cell
7

lyticlysogenic cell reproduces and spreads provirus

A
lytic
B
lysogenic
8

What is the function of the capsid?

A
It allows a virus to live independently.
B
It is composed of genetic material.
C
It destroys the contents of a host cell.
D
It enables a virus to attach to hosts.
9

Which of the following illustrates a complex virus?

A
Option
B
Option
C
Option
D
Option
10

lyticlysogenic viral DNA merges with host cell DNA

A
lytic
B
lysogenic
11

The diagram to the right represents the lytic cycle. What is occurring at step C?

A
The pieces made in replication are assembled to complete the new virus particles.
B
The virus attaches to the host cell.
C
The host’s DNA is disassembled and the virus takes over the cell’s metabolic activity.
D
The new viral nucleic acid and viral proteins are replicated.
E
Lysis occurs, killing the cell.
12

The diagram to the right represents the lysogenic cycle. What is occurring at step D?

A
The provirus is created.
B
The provirus is replicated.
C
The provirus leaves the host cell’s nucleic acid.
D
The host cell divides.
13

Use your understanding of prevention and treatment of viruses to answer the questions below.A is a substance containing incomplete portions of a virus that produce an immune response when injected into the body.

Answer:

vaccine

14

lyticlysogenic no symptoms

A
lytic
B
lysogenic
15

Why are vaccines useful?

A
They can cure viral infections.
B
They increase the output of white blood cells.
C
They are able to help the body build an immune response against the virus.
16

lyticlysogenic viral DNA takes over

A
lytic
B
lysogenic
17

lyticlysogenic virus does not destroy host cell

A
lytic
B
lysogenic
18

lyticlysogenic virus destroys host cell

A
lytic
B
lysogenic
19

lyticlysogenic induces symptoms of viral infection

A
lytic
B
lysogenic

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