객관식
Which components make up the backbone of a DNA molecule?
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7. DNA and Chromosome Structure
DNA Structure
객관식
Which of the following lists correctly identifies the four nitrogenous bases found in DNA?
A
Adenine, Thymine, Guanine, Uracil
B
Adenine, Thymine, Guanine, Histidine
C
Adenine, Uracil, Guanine, Cytosine
D
Adenine, Thymine, Guanine, Cytosine
검증된 단계별 안내1
Recall that DNA is composed of four nitrogenous bases which are divided into two categories: purines and pyrimidines.
Identify the purines in DNA: Adenine (A) and Guanine (G).
Identify the pyrimidines in DNA: Thymine (T) and Cytosine (C).
Note that Uracil (U) is found in RNA, not DNA, and Histidine is an amino acid, not a nitrogenous base.
Therefore, the correct list of nitrogenous bases in DNA is Adenine, Thymine, Guanine, and Cytosine.
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