Question

In an experiment, DNA was found to have 31 % adenine and 19% guanine. Identify the percentage of cytosine in the given molecule of DNA.

Options

• 62%

• 31%

• 19%

• 38%

Answer 1

19%

Explanation:

The quantity of purine in DNA is the same as the amount of pyrimidine. 'A+G=C+T,' according to Chargaff's rule. Because guanine always mates with cytosine in a DNA molecule, the amount of cytosine must also be 19 percent.