Question

A short length of dna molecule has 60 adenin and 60 guanine bases. the total number of nucleotide in dna fragment is ​

Answer 1

Explanation:

According to Chargaff’s rule, in all cellular DNAs, regardless of the species, number of adenosine residues is equal to number of thymidine residues which means that A=T; and the number of guanosine residues is equal to the number of cytidine residues (G= C). Hence, that the sum of the purine residues equals the sum of the pyrimidine residues, i.e., A + G = T + C.

Hence, a DNA strand with 80 thymine and 80 guanine bases will have 80 adenine and 80 cytosine bases. This makes total 80+80+80+80 = 320 bases and therefore, 320 nucleotides in that DNA molecule.