Biomolecules Question 216

Question: Which of the following substances is not present in nucleic acids-

Options:

A) Cytosine

B) Adenine

C) Thymine

D) Guanidine

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Guanidine, $ H_2N-\overset{NH}{\mathop{\overset{||}{\mathop{C}}}}-NH_2 $ , is neither a purine nor a pyrimidine base