External Factor Types

Question 1

virus

Answer 1

• binds to membrane bound receptors of host cell
• virus inserts it’s nucleic acid into host DNA
• function of host cell disrupted (breakdown of dynamic equilibrium)
• uses host reproductive process to synthesize more viruses and courses the cell to burst, releasing all the viruses to infect other cells

Question 2

prions

Answer 2

infectious protein particles
misshaped protein that causes healthy body proteins to become misshaped

Question 3

X

Answer 3

Alpha, healthy protein shape

Question 4

B

Answer 4

beta [pleated sheet], unhealthy protein shape

Question 5

Example of prions

Answer 5

Mad cow disease, Scorpie, creutzfeldt

Question 6

Mad cow disease

Answer 6

Bovine spongiform encephalopathy

Question 7

Sheep

Answer 7

Scorpie

Question 8

Creutzfeldt

Answer 8

Jacob disease (Kuru) = cannibalism