Question:
The correct pairing of purine and pyrimidine bases in DNA is:
The correct pairing of purine and pyrimidine bases in DNA is:
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DNA: A-T, G-C.
RNA: A-U, G-C.
Purines: A, G. Pyrimidines: T, C, U.
RNA: A-U, G-C.
Purines: A, G. Pyrimidines: T, C, U.
Updated On: Aug 18, 2026
- Adenine-Guanine
- Adenine-Thiamine
- Adenine-Uracil
- Adenine-Cytosine
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
DNA has specific base pairing rules.
Purines pair with pyrimidines.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the base pairing rules in DNA.
Step 3: Detailed Explanation:
In DNA, adenine (A) pairs with thymine (T).
Guanine (G) pairs with cytosine (C).
A and G are purines.
T and C are pyrimidines.
Adenine-Guanine is purine-purine pairing, which is incorrect.
Adenine-Uracil is in RNA.
Adenine-Cytosine is incorrect.
Thus, Adenine-Thiamine is the correct pairing.
Step 4: Final Answer:
The correct pairing is Adenine-Thiamine.
Hence, the correct option is (B).
DNA has specific base pairing rules.
Purines pair with pyrimidines.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the base pairing rules in DNA.
Step 3: Detailed Explanation:
In DNA, adenine (A) pairs with thymine (T).
Guanine (G) pairs with cytosine (C).
A and G are purines.
T and C are pyrimidines.
Adenine-Guanine is purine-purine pairing, which is incorrect.
Adenine-Uracil is in RNA.
Adenine-Cytosine is incorrect.
Thus, Adenine-Thiamine is the correct pairing.
Step 4: Final Answer:
The correct pairing is Adenine-Thiamine.
Hence, the correct option is (B).
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