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NEET2015ZoologyMolecular Basis of InheritanceActual

Which one of the following is an incorrect combination?

Options

  1. AAdenine, thymine, cytidine
  2. BAdenine, cytosine, thymine
  3. CGuanine, thymine, uracil
  4. DCytosine, uracil, guanine

Correct answer

A. Adenine, thymine, cytidine

Step-by-step solution

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).

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