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

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Question 10

Which row shows a pair of bases that can link two strands of DNA with two hydrogen bonds?

Base 1Base 2AcytosineguanineBadeninethymineCadeninecytosineDguaninethymine \begin{array}{|c|c|c|} \hline & \textbf{Base 1} & \textbf{Base 2} \\ \hline \textbf{A} & \text{cytosine} & \text{guanine} \\ \hline \textbf{B} & \text{adenine} & \text{thymine} \\ \hline \textbf{C} & \text{adenine} & \text{cytosine} \\ \hline \textbf{D} & \text{guanine} & \text{thymine} \\ \hline \end{array} ABCD​Base 1cytosineadenineadenineguanine​Base 2guaninethyminecytosinethymine​​
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

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

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

30 exam-style questions on AQA A Level Chemistry Amino acids, proteins and DNA (A-level only), covering Amino acids (A-level only), Proteins (A-level only), Enzymes (A-level only), DNA (A-level only), and Action of anticancer drugs (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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