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7.3 Synthetic and naturally occurring polymers

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Question 8

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

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7.3 Synthetic and naturally occurring polymers Questions

  1. GCSE
  2. /Chemistry
  3. /7.3 Synthetic and naturally occurring polymers

94 exam-style questions on AQA GCSE Chemistry 7.3 Synthetic and naturally occurring polymers, covering 7.3.1 Addition polymerisation, 7.3.2 Condensation polymerisation, 7.3.3 Amino acids, and 7.3.4 DNA (deoxyribonucleic acid) and other naturally occurring polymers. Each one has a worked solution and a mark scheme showing where the marks go.

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