Question

if a double stranded DNA is 30% cytosine then calculate the percentage of adenine in t.​

Answer 1

Answer:

Thus, if a double-stranded DNA has 20% cytosine, it has 20% guanine. Thus, C + G makes 40% of the total bases. The remaining 60% includes both adenine and thymine which are in equal amounts. So, the percentage of adenine is 30%.

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Answer 2

According to Chargaff’s rule 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.

That means:-

G= C.

If there is 30% cytosine which means guanine percentage is also 30%.

Thus, the percent of A+T= 100-(G+C)

A+T = 100-60 =40,  Adenine percent= 40/2= 20.

Ans:- The percent of adenine is 20%