Multiple Choice
In DNA, the two purines are __________, and the two pyrimidines are __________.
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7. DNA and Chromosome Structure
DNA Structure
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DNA is made of four different bases: _______, _______, _______, and ______. Which of the following lists correctly names all four bases found in DNA?
A
Adenine, Guanine, Uracil, Thymine
B
Adenine, Thymine, Cytosine, Guanine
C
Adenine, Uracil, Cytosine, Guanine
D
Adenine, Thymine, Cytosine, Uracil
Verified step by step guidance1
Recall that DNA is composed of four nitrogenous bases, which are divided into two categories: purines and pyrimidines.
Identify the purine bases in DNA, which are Adenine (A) and Guanine (G).
Identify the pyrimidine bases in DNA, which are Cytosine (C) and Thymine (T).
Note that Uracil (U) is not found in DNA; it is found in RNA instead, replacing Thymine.
Therefore, the correct list of bases found in DNA is Adenine, Thymine, Cytosine, and Guanine.
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