Scelta multipla
In an RNA strand that is base-pairing with a DNA strand, which RNA nitrogenous base forms complementary hydrogen bonds with DNA thymine (T)?
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7. DNA and Chromosome Structure
RNA
Scelta multipla
RNA contains which of the following nitrogenous bases?
A
Thymine
B
Uracil
C
7-methylguanine
D
5-methylcytosine
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Recall that nucleic acids, DNA and RNA, are composed of nitrogenous bases that pair specifically to encode genetic information.
Identify the four standard nitrogenous bases in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).
Understand that RNA differs from DNA in one key base: RNA contains uracil (U) instead of thymine (T).
Recognize that 7-methylguanine and 5-methylcytosine are modified bases found in some RNA molecules but are not standard bases in the RNA sequence.
Conclude that the nitrogenous bases in RNA include adenine, uracil, cytosine, and guanine, with uracil replacing thymine found in DNA.
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