Multiple Choice
Which type of bonds form between complementary nitrogenous bases and help hold the two strands of DNA together?
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
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
Verified step by step guidance1
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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