Scelta multipla
Which of the following is the repeating monomer unit of a DNA molecule?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
In DNA, which nitrogenous base pairs with adenine?
A
Guanine
B
Cytosine
C
Thymine
D
Uracil
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Recall the base pairing rules in DNA, which are based on complementary nitrogenous bases.
Understand that adenine (A) pairs specifically with thymine (T) in DNA through two hydrogen bonds.
Recognize that guanine (G) pairs with cytosine (C), not adenine.
Note that uracil (U) replaces thymine in RNA, but in DNA, adenine pairs with thymine.
Therefore, the nitrogenous base that pairs with adenine in DNA is thymine.
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