Which of the following statements is correct?

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Question

(D) $1$. Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon, i.e., the $\alpha$-carbon

Vedclass · Accepted Answer

All of the above.

Vedclass · Answer

(D) $1$. Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon, i.e., the $\alpha$-carbon. Hence, they are often called $\alpha$-amino acids. They can be structurally considered as substituted methanes where the four substituent groups occupy the four valency positions of the $\alpha$-carbon: hydrogen, carboxyl group, amino group, and a variable $R$ group.$2$. The chemical and physical properties of amino acids are essentially determined by the $R$ group. Since the other three groups are constant in all $\alpha$-amino acids, they differ from each other only by the nature of the $R$ group.$3$. Based on the nature of the $R$ group, there are many amino acids. For example, if the $R$ group is hydrogen, it is glycine; if it is a methyl group, it is alanine; and if it is a hydroxymethyl group $(-CH_2OH)$, it is serine.$4$. Therefore, all the given statements are correct.

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