Multiple Choice
Which part of the DNA molecule is most directly associated with the coding of genetic information?
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
The DNA molecule is usually found in which structural form in cells?
A
B-form double helix
B
Single-stranded linear
C
Z-form double helix
D
A-form double helix
Verified step by step guidance1
Understand that DNA can adopt several structural conformations, including A-form, B-form, and Z-form double helices, as well as single-stranded forms.
Recall that the B-form double helix is the most common and biologically relevant structure of DNA under physiological conditions in cells.
Recognize that the A-form double helix is typically found in dehydrated samples or RNA-DNA hybrids, not usually in normal cellular DNA.
Know that the Z-form double helix is a left-handed helix and occurs under certain conditions but is rare in cells.
Conclude that the DNA molecule in cells is predominantly found in the B-form double helix structure.
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