Exam 2 Virus and Prions PT 1

Question 1

Identify what viruses are

Answer 1

-Small Infectious Parasites
-bind with intracellular parasites
- Acellular

Question 2

Identify what viruses are not

Answer 2

• They are not cells

Question 3

Identify the major components all viruses contains

Answer 3

• Nucleic Acid (genome)
• Capsid (protein coat)

Question 4

Nucleic Acid

Answer 4

DNA viruses and RNA viruses

Question 5

DNA Viruses

Answer 5

-Double stranded (dsDNA)
-Single stranded (ssDNA)

Question 6

RNA Viruses

Answer 6

-Double stranded (dsRNA)
-Single stranded (ssRNA)

Question 7

Viruses that exist based on their nucleic acid

Answer 7

Helical Virus
- RNA, Capsid
Polyhedral Virus
- Capsid, DNA, Glycoprotein
Spherical Virus
- RNA, Capsid, Glycoprotein
Complex Virus
-Head,DNA, Tail Sheath, Tail Fiber

Question 7

Role of Capsid

Answer 7

A protein coat that protects genome

Question 8

What is Capsid built from

Answer 8

Built from capsomeres
Can contain viral glycoproteins for cell entry

Question 9

Location of Viral Envelopes

Answer 9

Buds through the plasma membrane

Question 10

Function of Viral Envelopes

Answer 10

Surrounds some Capsid

Question 11

Composition of Viral Envelopes

Answer 11

Combo of viral and host cell molecules
- has cell membrane components
-Has viral glycoproteins for cell entry

Question 12

Host Range

Answer 12

What host viruses can infect

Question 13

Wide Host Range

Answer 13

multiple species are susceptible

Question 14

Narrow Host Range

Answer 14

single species or cell in species is susceptible

Question 15

Lock and Key Recognition

Answer 15

Viral glycoproteins(key) bind to a specific host cell surface receptors (lock)