Variety among amino acids is produced due to_____________?
Correct answer: C. R group
- A. NH2 group
- B. COOH group
- C. R group
- D. All of these
Explanation
All standard amino acids have an amino group and a carboxyl group, but their variable R groups differ and produce their chemical variety. The likely alternative is “all of these,” which confuses groups shared by amino acids with the group responsible for their differences.
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Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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