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(C) Proteins are heteropolymers of amino acids. Each amino acid consists of an amino group $(-NH_2)$,a carboxyl group $(-COOH)$,a hydrogen atom,and a

Vedclass · Accepted Answer

$C, H, O, N, S$

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(C) Proteins are heteropolymers of amino acids. Each amino acid consists of an amino group $(-NH_2)$,a carboxyl group $(-COOH)$,a hydrogen atom,and a variable $R$-group attached to a central alpha-carbon. Therefore,all proteins essentially contain Carbon $(C)$,Hydrogen $(H)$,Oxygen $(O)$,and Nitrogen $(N)$. Many proteins also contain Sulfur $(S)$ due to the presence of sulfur-containing amino acids like cysteine and methionine. While some proteins may contain Phosphorus $(P)$ as a prosthetic group (e.g.,phosphoproteins),the fundamental elemental composition of all proteins is $C, H, O, N, S$. Thus,option $C$ is the most comprehensive answer regarding the elemental composition of proteins.

Which elements are present in the structure of proteins?

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