Flashcards in Viruses Deck (11)
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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
