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7 Organic chemistry

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Question 13

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 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
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