Which of the following statements concerning the double helix structure present in DNA molecules is correct?
A) The two nucleotide strands are mirror images of each other.
B) Hydrogen bonds between sugar units hold the two nucleotide strands together.
C) Base pairing between strands always involves one pyrimidine base and one purine base.
D) Base pairing combinations are always A-G and C-T.
Correct Answer:
Verified
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