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RNA does not have the nitrogen base of _______

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RNA does not have the nitrogen base of _______

(a) Uracil

(b) Cytosine

(c) Thymine

(d) Adenine

The question was asked by my college professor while I was bunking the class.

This intriguing question comes from Types of Biological Molecules in portion Structures and Functions of Biological Molecules of Cell Biology

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Correct choice is (c) Thymine

The explanation is: RNA does not have the pyrimidine Thymine and has Uracil instead while DNA has Thymine. In RNA, Adenine binds to Uracil with two hydrogen bonds while in DNA, Adenine binds to Thymine by two hydrogen bonds.

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