Scelta multipla
In the context of DNA structure, what are the monomers of DNA?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
In DNA structure, the “twisted ladder” shape of DNA is called the:
A
Beta-pleated sheet
B
Double helix
C
Alpha helix
D
Single helix
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Understand that the question is asking for the name of the specific shape of DNA, often described as a 'twisted ladder.'
Recall that DNA's structure was discovered by Watson and Crick, who described it as two strands twisted around each other.
Recognize that the term 'double helix' refers to this two-stranded, spiral shape of DNA.
Differentiate this from other structural terms: 'beta-pleated sheet' and 'alpha helix' are terms related to protein secondary structures, not DNA.
Conclude that the correct term for the 'twisted ladder' shape of DNA is 'double helix.'
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