Biodiversity- (4) Viruses

Question 1

What is a virus?

Answer 1

Structure that contains either DNA/RNA and is surrounded by a protective protien coating (capsid)

Question 2

Are they alive?

Answer 2

No- they are unable to survive outside of a host cell, and are considered neither eukaryotic nor prokaryotic

Question 3

How are viruses classified?

Answer 3

based on capsid, size, and shape

Question 4

What are the 4 shapes of viruses?

Answer 4

Helical, Poyhedral, Spherical, and complex.

Question 5

What are the two replication cycles of a virus

Answer 5

Lyctic and Lysogenic

Question 6

Explain the lyctic cycle

Answer 6

Virus takes over host cell machinery to create virus protiens. 1. Attatchment and entry. 2) Replication. 3.)Assembly process. 4.) Release.

Question 7

Explain the Lysogenic cycle

Answer 7

Virus integrates into host cells DNA and replicates “Pro-virus”. At this stage the virus is asymptomatic, but will eventually enter the lyctic cycle and show symptoms.

Question 8

Replication patters and disease

Answer 8

Herpes cold sores- appear in lyctic cycle and are dormant in lysogenic cycle (Provirus)

Question 9

Metabolism of prokaryotes

Answer 9

Anaerobic- No 02 needed for cellular respiration

Question 10

Metabolism of Eukaryotes

Answer 10

Aerobic- 02 needed for cellular respiration

Question 11

how do prokaryotes replicate

Answer 11

Binary fission