Question

Which of the following statements are incorrect with respect to nucleotides?
(A) Purines and pyrimidines are nitrogenous bases.
(B) Nucleotides are non-enzymatic molecules.
(C) Phosphate group is linked to – OH of 5′ C of a nucleoside through phosphoester linkage.
(D) In RNA, every nucleotide residue has an additional – OH group present at 2′ position in the ribose.
(E) Thymine is an example of Pyrimidine.
Choose the correct answer from the options given below:

• A. (A), (B) and (E) only
• B. (D) and (E) only
• C. (B) and (D) only
• D. (B) and (E) only

Answer 1

The Correct Option is D

Nucleotides are enzymatic molecules, and thymine is a pyrimidine, not an incorrect statement. However, option (B) stating that nucleotides are non-enzymatic is incorrect, and option (E) is incorrect because thymine is indeed a pyrimidine.