Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
Which statement correctly describes one way that RNA differs from DNA?
A
RNA contains thymine in place of uracil.
B
RNA is typically a double-stranded helix, whereas DNA is typically single-stranded.
C
RNA contains uracil in place of thymine.
D
RNA uses deoxyribose sugar, whereas DNA uses ribose sugar.
Verified step by step guidance1
Identify the key structural components that differentiate RNA from DNA, focusing on the nitrogenous bases, sugar molecules, and strand structure.
Recall that DNA contains the bases adenine (A), thymine (T), cytosine (C), and guanine (G), while RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G).
Understand that RNA uses ribose sugar, which has an extra oxygen atom compared to the deoxyribose sugar found in DNA.
Recognize that DNA is typically double-stranded forming a double helix, whereas RNA is usually single-stranded.
Compare each statement in the problem to these facts to determine which correctly describes a difference between RNA and DNA.
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