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Biology · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 3 · Q10
A DNA molecule is 140 base pairs long. It has 20 % thymine. How many guanine bases are present in the molecule?
A DNA molecule is $\displaystyle 140$ base pairs long. It has $\displaystyle 20 \%$ thymine. How many guanine bases are present in the molecule?
Official answer
(B)
$\displaystyle 84$
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