Question

താഴെ പറയുന്നവയിൽ ഏതാണ് സൈറ്റോസിനിനെ ഏറ്റവും നന്നായി വിവരിക്കുന്നത്?

• A. pyrimidine, present in RNA and DNA
• B. pyrimidine, present only in DNA
• C. purine, present only in RNA
• D. purine, present in RNA and DNA

Answer 1

Answer:

A. pyrimidine, present in RNA and DNA

Bases (nitrogen containing heterocyclic compounds) are of two types. Those that have a single ring are pyrimidines and those that have two fused rings are purines . Adenine, guanine and cytosine are present in both RNA and DNA.