Question

As the base sequance present on one strand of DNA decides the base sequance of other strand is considered as ........ ​

Answer 1

adenine guanine thiamine and cystoine which are known as purines

Answer 2

According to Chargaff's first rule, in a double stranded DNA, number of adenines will be equal to number of thymine and number of cytosine will be equal to number of guanine. This is because each purine/pyrimidine forms a hydrogen bond with its respective pyrimidine/purine, i.e. adenine forms hydrogen bond with thymine and guanine with cytosine.

So, if the base sequence of one of the strands in a double stranded DNA is G-A-C-G-T-A-C, then the base sequence of the other stranded will be C-T-G-C-A-T-G.

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