Scelta multipla
Which statement about DNA and RNA is correct?
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7. DNA and Chromosome Structure
RNA
Scelta multipla
Which nitrogenous base is not present in RNA?
A
Adenine
B
Uracil
C
Thymine
D
Guanine
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Recall the four nitrogenous bases found in DNA: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
Understand that RNA also contains four nitrogenous bases, but one of them differs from DNA.
Identify the bases present in RNA: Adenine (A), Uracil (U), Cytosine (C), and Guanine (G).
Note that Uracil (U) replaces Thymine (T) in RNA, meaning Thymine is not found in RNA.
Conclude that the nitrogenous base not present in RNA is Thymine.
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