Question

If adenines make up 19% of the bases in the sequence of a fragment of singlestranded RNA, what can you tell me about the rest of that RNA fragment’s base composition?

Answer 1

According to the Chargaff's rules

We calculated base composition for DNA

[A + U + C + G + C]           =             100 %

[A+G] =             C+T

Here given         A =             19 %,    

So                           T =             19 %

[A+T] =             38 %

[G+C] =             100-38 = 62 %

G = C     =             62/2 = 31 %

For RNA Uracil present instead of Thymine

Result --

A = 19%, T = 19%, G = 31 %, C = 31 %