Which of the following statement(s) is incorrect?

Options

A $\alpha$ -carbon of $\alpha$ -amino acid is asymmetric
BAll proteins are found in the L-form
CHuman body can synthesize all proteins they need
DAt $\mathrm{pH}=7$ both amino and carboxylic groups exist in the ionized form

Correct answer

B. All proteins are found in the L-form

Step-by-step solution

Amino acids are organic compounds that contain amine (\left(-\mathrm{NH}_2\right)) and carboxyl ((-\mathrm{COOH})) functional groups, along with a side chain (R group) specific to each amino acid. a-carbon of cc-amino acid is asymmetric. Hence this statement is true. Proteins exist in both D and L -form. Human body can synthesize all proteins they need. At (\mathrm{pH}=7), both amino and carboxylic groups exist in ionised form.

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