A) Recombinant DNA DNA formed by the joining of segments of DNA from different sources
B) Purine Nitrogenous bases Cytosine, thymine and uracil
C) ATP The principal energy carrying compound in the cell
D) r-RNA RNA molecules found in ribosomes
Correct Answer: B
Solution :
Because cytosine, thymine and uracil are single ring compound i.e. pyrimidines while adenine and guanine are purines.You need to login to perform this action.
You will be redirected in
3 sec