Question

If the proportion of thymine in ds DNA is 43% then what will be the proportion of bicyclic N-bases in this DNA ? a) 43 % b) 7 % c) 14 % d) 50 %

Answer 1

Answer:

d) 50%

Explanation:

this is because the DNA is main reason of individuals.

Answer 2

Proportion of bicyclic N-bases in this DNA is - d) 50 %

DNA is made of two types of bases namely purines and pyrimidines.

Purines are double ringed and include adenine and guanine.

Pyrimidines are single ringed and include thymine and cytosine.

According to chargaff's rule, number of purines in DNA is equal to number of pyrimidines. Applying this rule, and according to given information thymine is 43%.

Thymine binds with adenine, hence adenine will also be 43%. Now, remaining bases according to rule will be - 14%.

Out of which, 7% will be cytosine and 7% will be guanine.

Hence, bicyclic N-bases will be - 50%.