Multiple Choice
In the DNA double helix, the two antiparallel strands are primarily held together by which type of interaction?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, the twisted ladder shape of DNA is called a:
A
Beta-pleated sheet
B
Alpha helix
C
Triple helix
D
Double helix
Verified step by step guidance1
Understand the question is asking about the specific shape of the DNA molecule.
Recall that DNA is composed of two strands twisted around each other, forming a characteristic shape.
Recognize that the term 'double helix' describes this twisted ladder-like structure of DNA.
Differentiate this from other structures such as 'alpha helix' (common in proteins) and 'beta-pleated sheet' (also a protein structure).
Conclude that the correct term for the twisted ladder shape of DNA is 'double helix'.
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