객관식
Which set correctly lists the four nitrogenous bases found in DNA?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, which pair of nitrogenous bases are classified as purines?
A
Guanine and cytosine
B
Adenine and thymine
C
Adenine and guanine
D
Cytosine and thymine
검증된 단계별 안내1
Recall that nitrogenous bases in DNA are divided into two categories based on their structure: purines and pyrimidines.
Understand that purines have a two-ring structure, while pyrimidines have a single-ring structure.
Identify the purines in DNA as adenine (A) and guanine (G), both of which have the characteristic two-ring structure.
Recognize that cytosine (C) and thymine (T) are pyrimidines, each with a single-ring structure.
Therefore, the pair of nitrogenous bases classified as purines in DNA are adenine and guanine.
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