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Flashcards in Viruses Deck (11):
1

viruses are examples of obligate parasites. explain why this is the case.

a virus cannot survive on its own, it needs a host in order to survive

2

give an example of how virus might be beneficial to mankind.

genetic engineering / cancer treatment

3

briefly describe how a virus replicates.

ATTACHMENT: virus attaches to host cell
ENTRY: viral nucleic acid pushed trough hole in host cell. Protein coat remains outside
SYNTHESIS: host DNA inactivated, viral nucleic acid uses host organelles to make new viral acid and proteins
ASSEMBLY: new viruses are made in host cell
RELEASE: host cell bursts releasing new viruses

4

Name economic and medical importance of viruses.

economic/ crop damage /human medical costs
medical importance/ genetic engineering / used in medical research

5

what are the two main biochemical components of a virus particle?

DNA or RNA / protein

6

Name two diseases caused by viruses

chicken pox
aids
cold

7

give beneficial application of a virus.

genetic engineering
cancer treatment

8

What is an antibiotic?

substance produced by microorganisms to kill harmful bacteria.

9

Name other benefit of virus.

can be used to transfer genes from one organism to another.

10

Name two types of lymphocytes and state a role of each when viruses or other microorganisms enter the blood.

B-cells / produce antibodies
T-cells / recognize and destroy infected or damaged cells

11

Comment briefly on the difficulty on classifying viruses as living organisms.

they have no cellular structures / they consist of protein coat surrounding a strand of either DNA or RNA