Question

The genome of an organism has 60% GC (Guanine-Cytosine) content. The Adenine in this genome is ________% (Answer in integer).

Hint:

In DNA, the sum of the percentages of GC and AT must be 100%. The percentage of Adenine is half of the AT content.

Answer 1

Correct Answer: 20

In a DNA molecule, the content of Adenine (A) is equal to the content of Thymine (T), and the content of Guanine (G) is equal to the content of Cytosine (C). This is due to base pairing. Therefore, if the GC content is 60%, the AT content must be 40%, as \( A + T = 40% \). Since the amounts of Adenine and Thymine are equal, the content of Adenine is: \[ \text{Adenine content} = \frac{40}{2} = 20%. \] Thus, the Adenine content in the genome is \( 20% \).