Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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15. Gene Expression
Introduction to Types of RNA
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Which of the following is a nucleotide found in RNA?
A
Cytosine
B
Thymine
C
Uracil
D
Adenine
Verified step by step guidance1
Understand that nucleotides are the building blocks of nucleic acids, such as DNA and RNA.
Recall that RNA (ribonucleic acid) is composed of four main nucleotides: adenine (A), cytosine (C), guanine (G), and uracil (U).
Note that thymine (T) is a nucleotide found in DNA, not RNA. In RNA, uracil (U) replaces thymine.
Identify the nucleotides listed in the problem: cytosine, thymine, uracil, and adenine.
Determine which of these nucleotides is unique to RNA by recognizing that uracil is the nucleotide found in RNA, replacing thymine from DNA.
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