Question

In the leucine-zipper motif, leucine occurs after every ____ amino acids.

(a) 2

(b) 4

(c) 6

(d) 8

I had been asked this question in an interview for internship.

Enquiry is from Gene Expression Control topic in section Control of Gene Expression of Cell Biology

Answer 1

The correct answer is (c) 6

The explanation is: In the leucine-zipper motif, the leucines occur every seventh amino acid along the length of alpha-helix. The alpha-helix is the part of the DNA-binding domain that fits into the major groove of DNA.