In fruit flies, per and tim proteins: a. inhibit the clock ...

[serike]

In fruit flies, per and tim proteins:
 
  a. inhibit the clock protein.
 b. promote the production of the clock protein.
 c. are inhibited by the clock protein.
 d. inhibit the production of each other and the clock protein.

Question 2

The origin of the SCN's rhythms may be
 
  a. exposure to the mother's rhythms in utero.
 b. input from the retinohypothalamic tract.
 c. exposure to melatonin.
 d. oscillations of protein production and degradation.

[chem1s3]

Answer to Question 1

a

Answer to Question 2

d