Question
Biology Question on Structure of DNA and RNA
Which of the following is not a component of DNA?
A
Thiamine
B
Adenine
C
Guanine
D
Cytosine
Answer
Thiamine
Explanation
Solution
Thiamine is a vitamin (Vitamin B1) and not a nucleotide base. DNA consists of the bases adenine, guanine, cytosine, and thymine. Remembering the difference between thymine (a DNA base) and thiamine (a vitamin) is crucial in such questions.