Viruses

Question 1

What are two biochemical components of viruses

Answer 1

1)Protein coat
2)nuclei acid (DNA or RNA)

Question 2

Are viruses cellular

Answer 2

They are non cellular

Question 3

How do scientists classify viruses?

Answer 3

Classified on shape

Question 4

What type of shapes do viruses have?

Answer 4

1)spherical
2)rod-shaped
3)complex shaped

Question 5

What term is used for viruses of how they reproduce

Answer 5

Replication

Question 6

Why are viruses known as obligate parasites?

Answer 6

Require a host player to replicate

Question 7

Give an example of a obligate parasite

Answer 7

Bacteriophage that infects bacteria

Question 8

What are the stages of virus replication

Answer 8

1)attachment
2)entry
3)synthesis
4)assembly
5)release

Question 9

How many stages are there in virus replication

Answer 9

5

Question 10

What is attachment in virus replication?

Answer 10

Attach to cell membrane

Question 11

What is entry in virus replication?

Answer 11

Nucleic acid pushed through

Question 12

What is synthesis in virus replication?

Answer 12

Uses host cells to produce new nucleic acid and protein coats

Question 13

Is assembly in virus replication?

Answer 13

Protein coat with a nucleic acid form new viruses

Question 14

What is release in virus replication?

Answer 14

Host cell bursts

Question 15

Why are viruses not assigned to any the five kingdoms of life?

Answer 15

As they are not considered to be living
1)they are non cellular
2)require host cell to replicate
3)only one type of nucleic acid (DNA or RNA)

Question 16

Why viruses can be classified as living?

Answer 16

1)they have nucleic acid
2)can replicate
3)protein coat

Question 17

Why can viruses be classified as non living?

Answer 17

1)They are non cellular
2)host cell can replicate
3)one type of nucleic acid

Question 18

A virus can be described as a piece of genetic material that has escaped from a cell. Give one piece of evidence

Answer 18

Contain nucleic acid

Question 19

What the benefits of economic and medical importance of viruses?

Answer 19

1)medical-produce vaccines
2)genetic engineering-used as vectors
3)control of infections-control bacterial infections

Question 20

What are the disadvantages of economic and medical importance if viruses?

Answer 20

Pathogens and can cause disease
1)human diseases
2)animal diseases
3)plant disease

Question 21

Give examples of human disease?

Answer 21

1)AIDS
2)common cold

Question 22

Give examples of animal diseases

Answer 22

1)Foot and mouth disease
2)rabies

Question 23

Give an example of plant diseases

Answer 23

1)Tobacco mosaic disease

Question 24

What abbreviation does HIV stand for?

Answer 24

Human immunodeficiency virus

Question 25

What abbreviation does AIDS stand for?

Answer 25

Acquired immune deficiency syndrome

Question 26

What term is used for how AIDS or HIV get into a person

Answer 26

Transmission

Question 27

How does HIV or AIDS get into a person?

Answer 27

§)Blood or semen 2)across the placenta or in breast milk

Question 28

What are the effects of the HIV virus

Answer 28

Enters a white blood cell 1)remain dormant can be identified as HIV positive 2)breaks down white blood cell and cannot produce any antibodies 3)resistance of infection is reduced

Question 29

What occurs to the antibodies in HIV ?

Answer 29

Antibodies don’t work

Question 30

What occurs when a AIDS person when they get a infection

Answer 30

Can die from common infections

Question 31

What is the prevention and control for HIV and AIDS

Answer 31

1)avoidance of intercourse so remain faithful to partner 2)using a condom 3)don’t use shared needles 4)should not donate blood

Question 32

If there a cure for AIDS

Answer 32

No cure or vaccine

Question 33

AIDS had orphaned many children in sub-Saharan Africa due to?

Answer 33

1)lack of education 2)cultural/religious reasons 3)lack of healthcare

Question 34

What is foot and mouth diease?

Answer 34

Affects animals with split hooves

Question 35

How is foot and mouth disease transmitted?

Answer 35

Contact with infected animals or with vectors

Question 36

What are the effects of foot and mouth disease?

Answer 36

1)Blisters in the mouth and hooves 2)Lost of weight, milk or wool

Question 37

How to prevent and control foot and mouth disease?

Answer 37

1)Animals killed and burnt 2)spread the disease can be prevented by keeping an area under quarantine

Question 38

How are viruses killed or controlled?

Answer 38

1)body’s immune system 2) lymphocytes produce antibodies