1. there are 7 pages in the Hormone action packet
2. The active form of G Protein has a GDP bound to it
3. The active form of G protein has a GTP bound to it
4. G protein is made of alpha, beta, gamma and delta subunits

1. Which is not false

1. The receptor of glucagon is a channel
2. The subunit of the G protein that acts on Adenylate cyclase is the alpha one
3. The subunit of the G protein that acts on Adenylate cyclase is Beta
4. B and C
5. None is true

1. Which is true

1. the second messenger is Adenylate cyclase
2. the second messenger is AMP
3. Adenylate cyclase can catalyse a reaction whereby an ester bond is formed, not broken
4. Adenylate cyclase is inhibited by caffeine
5. Adenylate cyclase is altered by pertussis drug

1. Which is true

1. adenylate cyclase activates a kinase
2. cholera and pertussis toxins have the same ultimate effect on the whole system
3. Cholera increases cAMP production whereas Pertussin toxin will cause its decrease
4. Cholera decreases cAMP production and pertussin toxin will increase cAMP
5. Both cholera and pertussin act directly on the same G protein
6. C and E
7. D and E
8. B and E

1. Which is true

1. glucagon causes the phosphorylation of enzymes in the cell
2. insulin activates phosphodiesterase
3. insulin inhibits phosphodiesterase
4. GDP activates Gs protein
5. Gi stands for initiatory G protein
6. A and b
7. E and F
8. A and c
9. D and F
10. A and B and D
11. A and C and E

Answers: c, b, c, b, f

Questions prepared by Michael Nawfal

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