If a DNA polymerase recognizes a guanine nitrogenous base on the template strand, which nitrogenous base will it polymerize to the growing complementary strand?
A. A
B. C
C. G
D. T
Answer (2)
Chargaff's rules state: adenine is complimentary to thymine and cytosine is complimentary to guanine. For this question, in order for polymerization of the growing complementary strand, guanine must bind with cytosine. Answer: B.C
When a DNA polymerase recognizes a guanine base on the template strand, it will polymerize a cytosine base on the growing complementary strand. Therefore, the answer is B: C.
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