The compound 'A' is a complementary base of ________ in DNA strands.
Biomolecules · Class 12 · JEE Main Previous Year Question
The compound 'A' is a complementary base of ________ in DNA strands.
- a
Uracil
- b
Guanine
- c✓
Adenine
- d
Cytosine
Adenine
Step 1: Identifying Base 'A' — Compound 'A' is Thymine, which is a pyrimidine found specifically in DNA strands.
Step 2: Complementary Pairing — Thymine (T) always forms two hydrogen bonds with the purine Adenine (A).
Step 3: Result Selection — Therefore, the complementary base of Thymine in DNA is Adenine. Correct option is (c).
Remember: Adenine and Thymine follow Chargaff’s rules for equal abundance in DNA.
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