Question

A scientist observes an enzyme polypeptide chain arranged in spiral turns that rise upward and are held in place by hydrogen bonds. Which level of structural arrangement is s/he looking at?

Answer 1

(a) Tertiary
(b) Quaternary
(c) Secondary

Answer 2

hydrogen bonds is the clue so A

Answer 3

Sounds to me like the scientist is looking at an alpha helix. At what level of structural arrangement do they occur?

Answer 4

@Calliope if it is an alpha helix then its secondary.and I think you are right :)

Answer 5

Thank you to the both of you! :D