Multiple Choice
Which of the following types of DNA is the most common DNA form?
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7. DNA and Chromosome Structure
Alternative DNA Forms
Multiple Choice
In the context of alternative DNA forms, what is uncoiled (less compact) DNA called?
A
Heterochromatin
B
Nucleosome core particle
C
Euchromatin
D
Telomere
Verified step by step guidance1
Understand that DNA in the cell nucleus exists in different structural forms based on how tightly it is packed.
Recognize that 'heterochromatin' refers to tightly packed, compact DNA which is generally transcriptionally inactive.
Know that 'euchromatin' is the less compact, uncoiled form of DNA that is more accessible for transcription and gene expression.
Recall that 'nucleosome core particles' are the basic units of DNA packaging, consisting of DNA wrapped around histone proteins, but this term refers to a structural unit rather than the overall compactness.
Identify that 'telomeres' are specialized DNA sequences at chromosome ends, not related to the compactness of DNA, so the uncoiled DNA form is called euchromatin.
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