객관식
Which type of bonds form between complementary nitrogenous bases and help hold the two strands of DNA together?
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7. DNA and Chromosome Structure
DNA Structure
객관식
The four nitrogenous bases found in DNA are:
A
Adenine, thymine, cytosine, and uracil
B
Adenine, thymine, cytosine, and guanine
C
Adenine, thymine, guanine, and ribose
D
Adenine, uracil, cytosine, and guanine
검증된 단계별 안내1
Recall that DNA is composed of four nitrogenous bases which pair specifically to form the double helix structure.
Identify the purine bases in DNA: Adenine (A) and Guanine (G).
Identify the pyrimidine bases in DNA: Cytosine (C) and Thymine (T).
Note that Uracil (U) is found in RNA, not DNA, and ribose is a sugar, not a nitrogenous base.
Conclude that the correct set of nitrogenous bases in DNA is Adenine, Thymine, Cytosine, and Guanine.
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