Biology - Unit 3, Viruses

Question 1

What is a virus?

Answer 1

A particle that causes disease in organisms and consists of a core of nucleic acid surrounded by a protein coat.

Question 2

Virus process of reproduction:

Answer 2

Viral replication.

Question 3

What is the lytic cycle?

Answer 3

The viral replication process that rapidly kills a host cell.

Question 4

What is the lysogenic cycle?

Answer 4

The viral replication in which the virus does not immediately kill a host cell.

Question 5

What is prophage?

Answer 5

The nucleic acid of a bacterial virus that is attached to the host’s chromosomes.

Question 6

What are retroviruses?

Answer 6

Replicate nucleic acid in the reverse of the standard way. (make DNA from RNA)

Question 7

Examples of viruses

Answer 7

• common cold
• HIV
• Influenza
• Polio
• Chicken Pox
• measels
• rabies

Question 8

Why are viruses not in the Kingdom of Life?

Answer 8

• they are not made of a cell

- they need a host in order to survive

Question 9

How are viruses similar to living things?

Answer 9

• they have genetic material

- can reproduce

Question 10

How are viruses structured?

Answer 10

• core made of genetic material (DNA or RNA)

- protein coat

Question 11

What is a capsid?

Answer 11

protein coat of a virus that surrounds the DNA/RNA of a virus.