Question

The following diagrams represent the nitrogenous bases of nucleic acid molecules. Identify the correct combination

• A. A-uracil, B-adenine, C-thymine, D-guanine, E- cytosine
• B. A - uracil, B-guanine, C-cytosine, D-adenine, E-thymine
• C. A-uracil, B - guanine, C-thymine, D-adenine, E-cytosine
• D. A-thymine, B-guanine, C-uracil, D-adenine, E-cytosine.

Answer 1

The correct option is A A-uracil, B-adenine, C-thymine, D-guanine, E- cytosine

Purines and Pyrimidines are nitrogenous bases that make up the two different kinds of nucleotide bases in DNA and RNA.
Adenine and guanine are two-carbon nitrogen ring bases and are purines, while the one-carbon nitrogen ring bases (thymine,uracil and cytosine) are pyrimidines.