Multiple Choice
What type of bonds hold the two antiparallel strands of DNA together in the double helix structure?
34. Nucleic Acids
DNA Double Helix
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What is the diameter of the DNA double helix and the distance between adjacent base pairs?
A
20 Å diameter and 3.4 Å between base pairs
B
10 Å diameter and 2.0 Å between base pairs
C
15 Å diameter and 5.0 Å between base pairs
D
25 Å diameter and 4.0 Å between base pairs
Verified step by step guidance1
Understand that the DNA double helix is a structure composed of two strands that wind around each other, forming a spiral shape.
Recall that the diameter of the DNA double helix refers to the width of the helix, which is a constant value due to the uniform structure of DNA.
Recognize that the distance between adjacent base pairs is the space between two consecutive pairs of nucleotides along the DNA strand.
Review the standard measurements for DNA: the diameter of the double helix is typically 20 Å (angstroms), and the distance between adjacent base pairs is approximately 3.4 Å.
Compare the given options with the standard measurements to identify the correct answer: 20 Å diameter and 3.4 Å between base pairs.
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