Question

A sample of normal double-stranded DNA was found to have thymine content of 27%. What will be the expected proportion of guanine in this strand?

विकल्प

• 23%

• 32%

• 36%

• 73%

Answer 1

23%

Explanation:

According to Chargaff’s rules, in DNA, A = T and G = C;

Thus, A + T + G + C = 100

Given, T = 27% so A = T = 27%

Thus, A + T

= 27 + 27

= 54%

Thus, G + C

= 100 – 54

= 46%

Since G = C, so G = `46//2` = 23%