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7 Organic chemistry

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Question 18

A scientist examines an amino acid in the middle of a polypeptide chain. The amino acid has a peptide link to a neighbouring amino acid on each side.

Which statement explains why this amino acid can form a peptide link on each side?

[1]
A

Its carboxylic acid group reacts twice to form links on both sides of the chain

B

Its amine group reacts twice to form links on both sides of the chain

C

A water molecule forms each peptide link between the neighbouring amino acids

D

Its amine group reacts to form one link and its carboxylic acid group reacts to form the other

Markscheme

7 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /7 Organic chemistry

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