Quiz 4 Questions

Question 1

Helical viruses have

Answer 1

Cylindrical capsid enclosing nucleic acid

Question 2

A usual function of spikes on virus particles is to:

Answer 2

Attach the virus particle to the host

Question 3

A reasonable definition of the term “helminth” is:

Answer 3

A parasite worm or close relative

Question 4

Virus particles (virions) are almost within what size range?

Answer 4

b. 20-1000 nm

Question 5

In the field of viruses that affect animals or plants, “transformation” means:

Answer 5

Turning a normal cell into a cancer cell

Question 6

Lichens are life forms composed of what in symbiotic relationships?

Answer 6

fungi and algae

Question 7

Viral diseases can be diagnosed by:

Answer 7

detection of specific nucleic acid sequences.
signs and symptoms
detection of specific antibodies

Question 8

Plasmodium species microorganisms cause

Answer 8

Malaria

Question 9

Prions are composed of:

Answer 9

protein only

Question 10

Scabies is cause by:

Answer 10

an arthropod

Question 11

Bacteriophage grown on bacteria on solid media form visible

Answer 11

plaques

Question 12

A provirus is

Answer 12

A virus with its genetic material embedded in that of the host

Question 13

A protozoal disease which is sexually transmitted is

Answer 13

trichomoniasis

Question 14

Which of the following is NOT a method of culturing animal viruses?

Answer 14

On an agar plate

Question 15

Moulds are usually routinely identified on the basis of

Answer 15

the microscopic appearance of their spore-bearing hyphae

Question 16

Enveloped viruses have

Answer 16

d.

lipid layer, protein coat and genetic material

Question 17

Which of the following statements about fungi is FALSE?

Answer 17

all fungi reproduce asexually

Question 18

Viroids have

Answer 18

genetic material only

Question 19

Which is incorrect? Fungal infections are:

Answer 19

often treated with penicillin

Question 20

Which of the following is not in the bacteriophage lytic cycle?

Answer 20

Integration of phage genome into host genome

Question 21

A latent virus infection is

Answer 21

An inactive virus infection with the potential to become active and cause disease

Question 22

Place the steps of viral multiplication in the correct order.
1-release, 2-maturation, 3-adsorption, 4-uncoating, 5-penetration, 6-biosynthesis

Answer 22

3, 5, 4, 6, 2, 1

1-release, 2-maturation, 3-adsorption, 4-uncoating, 5-penetration, 6-biosynthesis

Question 23

Large seaweeds that mostly grow at moderate depth in the ocean mostly belong to the:

Answer 23

brown algae

Question 24

Which virus is well known for causing cancer in humans?

Answer 24

Human papilloma virus

Question 25

Fungi can be reliably distinguished from plants because they

Answer 25

do not contain chlorophyll

Question 26

To see the structure of viruses, it is necessary to use

Answer 26

an electron microscope

Question 27

Which of the following viruses causes glandular fever and can also sometimes cause cancer?

Answer 27

Epstein Barr virus

Question 28

Many fungi thrive where bacteria cannot grow . This is because

Answer 28

Fungi can tolerate extremes of osmotic pressure

Question 29

Bacteria resemble viruses in that thay have

Answer 29

Genetic material composed of nucleic acid

Question 30

``` Which of the following is true about viruses? They have RNA or DNA b. They cannot metabolise nutrients c. They are not composed of cells Correctd. All of the above ```

Answer 30

a. They have RNA or DNA b. They cannot metabolise nutrients c. They are not composed of cells