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Biology
Which one of the following is an incorrect combination?
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Q. Which one of the following is an incorrect combination?
AIIMS
AIIMS 2015
Biomolecules
A
Adenine, thymine, cytidine
70%
B
Adenine, cytosine, thymine
11%
C
Guanine, thymine, uracil
11%
D
Cytosine, uracil, guanine
8%
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).