A) Cytosine
B) Guanine
C) Adenine
D) Tyrosine
Correct Answer: D
Solution :
A nucleotide contains a pentose sugar [deoxyribose (in DNA) or ribose (in RNA], nitrogeneous base [such as adenine or guanine or thymine (in DNA) or cytosine or uracil (in RNA)] and a phosphate molecule.
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