Biochemistry Guanine ring – True are all except ? A It has 9 atoms B Aspaate acts as the amino group donor for forming guanine C Carbonyl group at C6 acts as a hydrogen bond acceptor D It forms three hydrogen bonds with cytosine 💡 Explanation Guanine ring - True are all except ? ✓ Correct Answer: B. Aspaate acts as the amino group donor for forming guanine