16. A mutation in the I gene produces a repressor which is not able to bind lact

Question

16. A mutation in the I gene produces a repressor which is not able to bind lactose. This will lead to:
a. permanent blockage of transcription.
b. lactose catabolism.
c. exon shuffling
d. catabolite activation.
e. recombination.

17. The presence of glucose leads to down regulation of the lac operon by:
a. exon shuffling
b. catabolite repression
c. transcription
d. deletion
e. polymerization

18. Histone acetylation transferases (HATs) add acetate groups to the tails of _________________.
a. cytosines
b. histones
c. chromatins
d. TATAs
e. GC boxes

Explanation / Answer

16a. permanent blockage of transcription. 17 b. catabolite repression 18 b histones

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