Multiple Choice
Which of the following is the type of bond between the nitrogenous bases in a DNA molecule?
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14. DNA Synthesis
Introduction to DNA Replication
Multiple Choice
Which of the following pairs of nitrogenous bases are correctly paired in DNA?
A
Guanine (G) with Thymine (T)
B
Adenine (A) with Thymine (T)
C
Thymine (T) with Guanine (G)
D
Cytosine (C) with Adenine (A)
Verified step by step guidance1
Step 1: Understand the structure of DNA. DNA is composed of two strands forming a double helix, and the nitrogenous bases pair through hydrogen bonds to stabilize the structure.
Step 2: Recall the base-pairing rules in DNA. Adenine (A) pairs with Thymine (T) through two hydrogen bonds, and Cytosine (C) pairs with Guanine (G) through three hydrogen bonds.
Step 3: Eliminate incorrect pairings. For example, Guanine (G) does not pair with Thymine (T), and Cytosine (C) does not pair with Adenine (A). These pairings do not follow the base-pairing rules.
Step 4: Confirm the correct pairings. Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G). These pairings are consistent with the complementary base-pairing rules in DNA.
Step 5: Apply this knowledge to answer the question. Identify the correct pairing from the options provided, ensuring it aligns with the base-pairing rules described above.
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