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7.3 Synthetic and naturally occurring polymers

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Question 6

A polypeptide is made from only one type of amino acid. Its repeating unit is [-NH-CH(CH2CH3)-CO-]n\left[\text{-NH-CH(CH}_2\text{CH}_3\text{)-CO-}\right]_n[-NH-CH(CH2​CH3​)-CO-]n​.

Which formula shows the amino acid monomer used to form this polypeptide?

[1]
A

H2NCH(CH3)CH2COOH\text{H}_2\text{NCH(CH}_3\text{)CH}_2\text{COOH}H2​NCH(CH3​)CH2​COOH

B

H2NCH2CH2CH2COOH\text{H}_2\text{NCH}_2\text{CH}_2\text{CH}_2\text{COOH}H2​NCH2​CH2​CH2​COOH

C

H2NCH(CH2CH3)COOH\text{H}_2\text{NCH(CH}_2\text{CH}_3\text{)COOH}H2​NCH(CH2​CH3​)COOH

D

CH3NHCH(CH3)COOH\text{CH}_3\text{NHCH(CH}_3\text{)COOH}CH3​NHCH(CH3​)COOH

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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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