Biomolecules · NEET Preparation Zoology
In a double-stranded DNA molecule, the percentage of thymine is 20%. What will be the percentage of guanine according to Chargaff's rules?
Practice question from Biomolecules (NEET Preparation Zoology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-E91272
In a double-stranded DNA molecule, the percentage of thymine is 20%. What will be the percentage of guanine according to Chargaff's rules?
- A.20%
- B.30%Correct answer
- C.40%
- D.60%
Solution
According to Chargaff's rules, Adenine equals Thymine (A = T = 20%) and Guanine equals Cytosine (G = C). Since A + T + G + C = 100%, 20% + 20% + G + C = 100%, meaning G + C = 60%, so G = 30%.
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