Scelta multipla
In the structure of DNA, which pentose sugar is present in the backbone?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
Which of the following components is NOT found in DNA?
A
Uracil (U)
B
Phosphate group
C
Deoxyribose sugar
D
Guanine (G)
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Recall the basic components of DNA, which include a phosphate group, a sugar molecule, and nitrogenous bases.
Identify the sugar in DNA as deoxyribose, which distinguishes it from RNA that contains ribose sugar.
List the four nitrogenous bases found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).
Recognize that uracil (U) is a nitrogenous base found in RNA, replacing thymine, and is not present in DNA.
Conclude that among the given options, uracil (U) is the component not found in DNA.
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