A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is

Question

A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is (A) 120 (B) 240 (C) 60 (D) 480.

Tardigrade Admin · Accepted Answer

According to Chargaff's rules, the amount of adenine is always equal to that of thymine, and the amount of guanine is always equal to that of cytosine i.e A = T (120) and G = C (120), therefore, the total no. of nucleotides would be 120 x 4 = 480.

Q. A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is

120

240

60

480.

According to Chargaff's rules, the amount of adenine is always equal to that of thymine, and the amount of guanine is always equal to that of cytosine i.e A = T (120) and G = C (120), therefore, the total no. of nucleotides would be 120 x 4 = 480.