The gene for a hormone necessary for insect development contains binding sites f

Question

The gene for a hormone necessary for insect development contains binding sites for three gene regulatory proteins called A, B, and C. A and B cannot bind simultaneously because the binding sites for A and B overlap. You make mutations in the binding sites for each of the proteins and measure hormone production in cells that contain equal amounts of the A, B, and C proteins. The results of your studies are summarized in the figure and table below. For questions 16-18 complete the statement with the answer that is consistent with the results shown in the table. A binds to its operator tightly than B binds to its operator. More Less A is a____activator of transcription than B Stronger Weaker C is able to prevent activation by____ A only B only Both A and B

Explanation / Answer

16) More .A binds more tightly than B to its operator because in cases where hormone production is off shows more bonding between A and B as a result transcription is blocked and no proteins are produced for hormone production.

17) Weaker. A is weaker activator where as B is strong activator to produce high level hormone production.

18)Both A and B. Comparing all the possible cases it can be concluded that C prevent activation by both A and B.

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