Scelta multipla
In the DNA double helix, what molecules form the sugar-phosphate backbone of each strand?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
Which of the following is a nitrogenous base found in DNA?
A
Ribose
B
Thymine
C
Uracil
D
Glycine
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Understand that DNA is composed of nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base.
Recall that the nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).
Identify that ribose is a sugar, not a nitrogenous base, and glycine is an amino acid, so neither are bases in DNA.
Recognize that uracil is a nitrogenous base found in RNA, not DNA.
Conclude that thymine is the nitrogenous base found specifically in DNA among the options given.
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