Which one of the following is an incorrect combination?

Question

Which one of the following is an incorrect combination? (A) Adenine, thymine, cytidine (B) Adenine, cytosine, thymine (C) Guanine, thymine, uracil (D) Cytosine, uracil, guanine

Tardigrade Admin · Accepted Answer

Adenine (A), guanine (G), cytosine (C), thymine (T) and uracil (U) are all nitrogenous bases, whereas cytidine is a nucleoside i.e., a combination of a nitrogenous base (cytosine) with a pentose sugar (ribose).

Q. Which one of the following is an incorrect combination?

Adenine, thymine, cytidine

Adenine, cytosine, thymine

Guanine, thymine, uracil

Cytosine, uracil, guanine

Adenine (A), guanine (G), cytosine (C), thymine (T) and uracil (U) are all nitrogenous bases, whereas cytidine is a nucleoside i.e., a combination of a nitrogenous base (cytosine) with a pentose sugar (ribose).