Scelta multipla
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
Scelta multipla
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
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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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