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  1. The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following option is correct?

    1. A is the sulphur containing amino acid - methionine
    2. D is the acidic amino acid - glutamic acid`
    3. C is an aromatic amino acid - tryptophan
    4. A is the C - terminal amino acid and D is N terminal amino acid
Correct Option: B

Glutamic acid and aspartic acid are acidic amino acids with two carboxylic groups and one amino group.


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