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AIIMS 2015
Exam
AIIMS
Year
2015
Subject
Zoology
Chapter
Molecular Basis of Inheritance

AIIMS 2015 · Zoology · Molecular Basis of Inheritance

Which one of the following is an incorrect combination?

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)(T) and uracil (U)(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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