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Which of the following elements is not present in a nitrogenous base? A Hydrogen B Carbon C Phosphorus D Nitrogen

Which of the following elements is not present in a nitrogenous base?

A

Hydrogen

B

Carbon

C

Phosphorus

D

Nitrogen

 
 
 

Grade:12th pass

1 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
one year ago
The nitrogen base present in nucleic acids has nitrogen, carbon, hydrogen and oxygen in the ring structure. Two types of nitrogen bases occur. They are-
1) Purines which have a double ring structure. They are adenine and guanine.
2) Pyrimidines, which have a single ring structure. They are thymine, cytosine and uracil.
Phosphorus forms a part of the nucleotides in thenucleic acid but it is not a part of the nitrogenous base.Thus the correct answer is option C.

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