An ideal α-helix has a pitch of 0.54 nm and a rise of 0.15 nm.What is the length along the helix axis for a segment of an ideal α-helix that contains 30 amino acids?
A)200 nm
B)4.50 nm
C)16.20 nm
D)55.5 nm

Question

Quizplus · Accepted Answer

The length along the helix axis for a segment of an ideal α-helix can be calculated by multiplying the rise per amino acid (0.15 nm) by the number of amino acids (30). Thus, 0.15 nm/amino acid * 30 amino acids = 4.5 nm.

An Ideal α-Helix Has a Pitch of 0