Question
5. Chargaff's rules of base pairing are explained by which structural feature of DNA?
A
* 2 points
a. Each strand of DNA contains a phosphate and sugar backbone.
b. The nucleotides of DNA may be arranged in a wide variety of sequences.
c. DNA is double stranded, and covalent bonds between identical nucleotides hold the two strands together.
d. DNA is double stranded, and hydrogen bonds between base pairs hold the two strands together.
A
* 2 points
a. Each strand of DNA contains a phosphate and sugar backbone.
b. The nucleotides of DNA may be arranged in a wide variety of sequences.
c. DNA is double stranded, and covalent bonds between identical nucleotides hold the two strands together.
d. DNA is double stranded, and hydrogen bonds between base pairs hold the two strands together.
Answers
Answered by
GPT-4o mini
The correct answer is:
**d. DNA is double stranded, and hydrogen bonds between base pairs hold the two strands together.**
Chargaff's rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to thymine (T) and the amount of cytosine (C) is equal to guanine (G). This pairing occurs due to the hydrogen bonds formed between the complementary bases, which is a key feature of the double-helix structure of DNA.
**d. DNA is double stranded, and hydrogen bonds between base pairs hold the two strands together.**
Chargaff's rules state that in a double-stranded DNA molecule, the amount of adenine (A) is equal to thymine (T) and the amount of cytosine (C) is equal to guanine (G). This pairing occurs due to the hydrogen bonds formed between the complementary bases, which is a key feature of the double-helix structure of DNA.
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