Question

which of these is the correct pattern of nucleotide base pairing?
○ adenine-guanine; cytosine-thymine
○ adenine-thymine; guanine-cytosine
○ adenine-adenine; thymine-thymine
○ adenine-guanine; adenine-cytosine

Explanation:

The correct nucleotide base pairing rule in DNA is that adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). This complementary base pairing is fundamental to DNA structure and replication.

Answer:

adenine-thymine; guanine-cytosine