JEE Main Chemistry question

Proteins mainly contain:

(A)C, H, O and NCorrect
(B)Only C and H
(C)C, H and O
(D)N and H

Answer: (A)

Solution

Proteins are built from amino acid residues, each contributing carbon, hydrogen, oxygen and nitrogen (with sulphur present in some residues); carbon, hydrogen,

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Question ID VK-151131