How many hydrogen bonds join cytosine and guanine?

  1. Three
  2. One
  3. Two
  4. Four
Answer

A) Three

C–G has three H-bonds; A–T has two. AS & A Level Biology · Topic 6 Nucleic Acids and Protein Synthesis · 6.1 Structure of nucleic acids and replication of DNA

Biology MCQ · More A Level Biology: Nucleic acids and protein synthesis MCQs · Practise