Multiple Choice
Which pair correctly states two basic differences between DNA and RNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In RNA, which nitrogenous base replaces thymine (T) found in DNA?
A
Uracil (U)
B
Adenine (A)
C
Guanine (G)
D
Cytosine (C)
Verified step by step guidance1
Understand that DNA and RNA are both nucleic acids composed of nitrogenous bases, sugars, and phosphate groups, but they differ in some bases.
Recall that DNA contains the bases adenine (A), thymine (T), guanine (G), and cytosine (C).
Know that RNA contains adenine (A), guanine (G), cytosine (C), but instead of thymine (T), it has a different base.
Identify that the base in RNA that replaces thymine (T) is uracil (U).
Conclude that in RNA, uracil (U) pairs with adenine (A) during base pairing, taking the place of thymine found in DNA.
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