KCET · Chemistry · Biomolecules
In an alkaline medium, glycine predominantly exists as/in a/an
- A cation
- B anion
- C Zwitter ion
- D covalent form
Answer & Solution
Correct Answer
(B) anion
Step-by-step Solution
Detailed explanation
In alkaline medium (high pH) amino acids exists as negatively charged particle (carboxyl group donates proton).
\[
\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COOH} \underset{\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COO}}{\stackrel{\text { High pH }}{\longrightarrow}}
\]
\[
\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COOH} \underset{\mathrm{H}_{2} \mathrm{~N}-\mathrm{CH}_{2}-\mathrm{COO}}{\stackrel{\text { High pH }}{\longrightarrow}}
\]
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