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प्रश्न
A DNA molecule is 160 base pairs long. It has 30% Guanine. How many Adenine bases are present in this DNA molecule?
पर्याय
48
64
96
192
MCQ
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उत्तर
64
Explanation:
In a DNA molecule, Guanine (G) pairs with Cytosine (C), and Adenine (A) pairs with Thymine (T). The percentage of G equals the percentage of C.
If 30% of the bases are Guanine, 30% must also be Cytosine. This leaves 40% for Adenine and Thymine combined. Since Adenine pairs with Thymine in equal amounts, half of 40% will be Adenine.
Percentage of Adenine
`= 40/2`
= 20%
Now, to find the number of Adenine bases in a 160 base pair molecule:
Number of Adenine bases
= 20% × 160
= 32 Adenine bases.
Therefore, the number of Adenine bases in this DNA molecule is 64
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