Multiple Choice
Which sugar is found in RNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In terms of chemical composition, what component is found in RNA but not in DNA?
A
Uracil (U)
B
Deoxyribose sugar
C
Thymine (T)
D
The phosphate group
Verified step by step guidance1
Understand the basic chemical components of nucleic acids: both DNA and RNA are made up of nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.
Identify the sugar component in DNA and RNA: DNA contains deoxyribose sugar, while RNA contains ribose sugar. This is a key difference but not the focus of this question.
Focus on the nitrogenous bases: DNA has adenine (A), thymine (T), cytosine (C), and guanine (G), whereas RNA has adenine (A), uracil (U), cytosine (C), and guanine (G).
Recognize that thymine (T) is found only in DNA, and uracil (U) replaces thymine in RNA. This means uracil is present in RNA but not in DNA.
Conclude that among the options given, uracil (U) is the chemical component found in RNA but not in DNA.
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