1. which of the following is a mechanism to imprint genes? a. acetylation of cyt

Question

1. which of the following is a mechanism to imprint genes?

a. acetylation of cytosine

b. phosphorylation of adenine

c. methylation of alanine

d. methylation of cytosine

2. A transcriptional repressor that controls the transcription of gene A is not normally active unless bound by an effector molecule X. In a certain cell, the domain of the repressor that binds X is mutated. With all other factors being the same, what effect do you predict on the transcription of gene A?

a. The effect on the transcription of gene A cannot be predicted.

b. The transcription of gene A will not be affected.

c. The transcription of gene A will increase.

d. The transcription of gene A will decrease.

Explanation / Answer

d. methylation of cytosine... DNA methylation is reason for gene imprinting and cytosine is partof DNA

c. The transcription of gene A will increase...... because repressor domain is mutated and it wont bind to x inhibiting formation of functional repressor hence repression is relieved and transcription increases..

HOPE IT HELPS.... REGARDS

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