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Structure and Properties of Amino Acids - Medical Science

Q1:

Serine and threonine are polar amino acids due to

A reactive hydroxyl group in the side chain

B reactive alcoholic group in the side chain

C reactive keto group in the side chain

D reactive aldehyde group in the side chain

ANS:A - reactive hydroxyl group in the side chain

What is the difference between hydroxyl and alcoholic group, both are OH?