Which represents the backbone of a protein? Note: R = amino acid side chain
N = nitrogen
Cα = alpha carbon
C = carbonyl carbon
A)R1R2R3R4R5.
B)Repeating units of N-C.
C)Repeating units of N-Cα-C.
D)Repeating units of Cα-C.

Question

Quizplus · Accepted Answer

The backbone of a protein consists of a repeating unit of nitrogen (N) attached to the alpha carbon (Cα) which is then attached to the carbonyl carbon (C). The amino acid side chain (R) is attached to the Cα and extends outward from the backbone. Therefore, choice C, which represents the repeating units of N-Cα-C, is the best choice.

Which Represents the Backbone of a Protein? Note: R =