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Amino acids, proteins and DNA (A-level only)

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Question 16

Which structure represents the predominant form of alanine in an aqueous solution at pH=12\text{pH} = 12pH=12?

H2N−CH(CH3)−COO−\text{H}_2\text{N}-\text{CH}(\text{CH}_3)-\text{COO}^-H2​N−CH(CH3​)−COO−

H3N+−CH(CH3)−COO−\text{H}_3\text{N}^+-\text{CH}(\text{CH}_3)-\text{COO}^-H3​N+−CH(CH3​)−COO−

H3N+−CH(CH3)−COOH\text{H}_3\text{N}^+-\text{CH}(\text{CH}_3)-\text{COOH}H3​N+−CH(CH3​)−COOH

H2N−CH(CH3)−COOH\text{H}_2\text{N}-\text{CH}(\text{CH}_3)-\text{COOH}H2​N−CH(CH3​)−COOH

Amino acids, proteins and DNA (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Amino acids, proteins and DNA (A-level only)