How many atoms form the backbone of the repeat unit of a protein?
A) 2
B) 4
C) 6
D) 8

Question

Quizplus · Accepted Answer

The backbone of a protein repeat unit consists of a nitrogen (N) atom, a carbon (C) atom, and an oxygen (O) atom, repeated sequentially in that order. This sequence is referred to as the N-C-C or peptide backbone. Therefore, six atoms form the backbone of a protein repeat unit, with the nitrogen atom being the first atom in the sequence. Choice C is the only option that correctly identifies the number of atoms involved in the repeat unit backbone.

How Many Atoms Form the Backbone of the Repeat Unit