Question

If the DNA of a species has the mole fraction of G + C = 0.36, calculate the mole fraction of A​

Answer 1

Answer:

0.32

Explanation:

G+c = 0.36 we know that Amount of G and C are equal

and total mole fraction is 1

content of A+T= 0.64

so

A=0.32

Answer 2

Answer:

The mole fraction of A​ is 0.32.

Explanation:

Chargaff's rule states in any double stranded DNA the number of guanine (G) units are equal to the number of cytosine (C) units and the number of adenine (A) units are equal to the number of thymine (T) units. So,in the dsDNA the molar ratio of A to T equals to 1. Similarly the molar ratio of G to C equals to 1.

If the DNA content of a species has the mole fraction of G + C =0.36, then G =0.18 and C =0.18 because we all know that G=C= 0.18.The total mole fraction is 1.

∴ (A+G)+(T+C)=1

or,(A+0.18)+(T+0.18)=1

or, 2A=0.64

or, A=0.32

Hence the mole fraction of A​ is 0.32.