Which among the following alpha-amino acids d | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The general structure of an $\alpha$-amino acid is $R-CH(NH_2)-COOH$. In this structure,the $\alpha$-carbon is attached to four different groups (

Vedclass · Accepted Answer

Glycine

Vedclass · Answer

(D) The general structure of an $\alpha$-amino acid is $R-CH(NH_2)-COOH$. In this structure,the $\alpha$-carbon is attached to four different groups ($H$,$NH_2$,$COOH$,and $R$) if $R$ is not a hydrogen atom. For glycine,the $R$ group is a hydrogen atom $(H)$. Thus,the structure of glycine is $H_2N-CH_2-COOH$. Since the $\alpha$-carbon in glycine is attached to two identical hydrogen atoms,it is achiral. Therefore,glycine is the only $\alpha$-amino acid that does not have a chiral carbon atom.

Which among the following $\alpha$-amino acids does $NOT$ have a chiral carbon atom?

Similar Questions

Consider the following sequence for aspartic acid:
$H_3N^+-CH(COOH)-CH_2COOH \leftrightarrow{pK_1=1.88} H_3N^+-CH(COO^-)-CH_2COOH \leftrightarrow{pK_R=3.65} H_3N^+-CH(COO^-)-CH_2COO^- \leftrightarrow{pK_2=9.60} H_2N-CH(COO^-)-CH_2COO^-$
The $pI$ (isoelectric point) of aspartic acid is:

Which of the following are protein fibers?

Denaturation of proteins leads to loss of its biological activity by

$A$ dipeptide,$X$ on complete hydrolysis gives $Y$ and $Z$. $Y$ on treatment with aqueous $HNO_2$ produces lactic acid. On the other hand,$Z$ on heating gives the following cyclic molecule.
Based on the information given,the dipeptide $X$ is:

Identify the acidic amino acid from the following list represented by three-letter symbols.

Vedclass Test Series

Exam Paper Generator

Online Exam Module