Question:medium
A DNA fragment has 3000 nucleotides, out of which 160 are Guanine. How many bases having double hydrogen bonds between them does this DNA fragment possess?
A DNA fragment has 3000 nucleotides, out of which 160 are Guanine. How many bases having double hydrogen bonds between them does this DNA fragment possess?
Show Hint
Remember that A-T forms two hydrogen bonds, while G-C forms three hydrogen bonds.
Updated On: Jan 13, 2026
- 160
- 320
- 1340
- 2680
Show Solution
The Correct Option is D
Solution and Explanation
Adenine (A) and Thymine (T) form double hydrogen bonds. Guanine (G) and Cytosine (C) form triple hydrogen bonds.
Data Provided:
- Total nucleotides: 3000.
- Guanine (G) count: 160.
- Cytosine (C) count: 160. (Guanine pairs with Cytosine).
- Calculation for Adenine + Thymine: Total nucleotides - (Guanine + Cytosine) = 3000 - (160 + 160) = 2680.
Data Provided:
- Total nucleotides: 3000.
- Guanine (G) count: 160.
- Cytosine (C) count: 160. (Guanine pairs with Cytosine).
- Calculation for Adenine + Thymine: Total nucleotides - (Guanine + Cytosine) = 3000 - (160 + 160) = 2680.
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