Question
Chemistry Question on Biomolecules
Which of the following is not present in a nucleotide?
A
cytosine
B
guanine
C
adenine
D
tyrosine
Answer
tyrosine
Explanation
Solution
A nucleotide contains a pentose sugar [Deoxyribose (in DNA) or ribose (in RNA)], nitrogenous base [such as adenine or guanine or thymine (in DNA) or cytosine or uraci (in RNA)] and a phosphate molecule.