AS and A Level Biology 7 Views 1 Answers
Avatar for Sourav Pan
Sourav PanOctober 29, 2024

State that the bases adenine and guanine are purines with a double ring structure, and that the bases cytosine, thymine and uracil are pyrimidines with a single ring structure (structural formulae for bases are not expected)

State that the bases adenine and guanine are purines with a double ring structure, and that the bases cytosine, thymine and uracil are pyrimidines with a single ring structure (structural formulae for bases are not expected)

Sourav Pan
Sourav PanOctober 29, 2024

Answered step-by-step

Adenine and guanine are classified as purines, which have a double-ring structure. In contrast, cytosine, thymine, and uracil are classified as pyrimidines, which have a single-ring structure.

  • Purines (double-ring): Adenine (A) and Guanine (G)
  • Pyrimidines (single-ring): Cytosine (C), Thymine (T), and Uracil (U)

These structural differences are crucial for base pairing in DNA and RNA, where purines pair with pyrimidines to maintain the structure of the nucleic acid molecules.

Start Asking Questions

This site uses Akismet to reduce spam. Learn how your comment data is processed.

⚠️
  1. Click on your ad blocker icon in your browser's toolbar
  2. Select "Pause" or "Disable" for this website
  3. Refresh the page if it doesn't automatically reload