Question

in a linear eukaryotic chromatin sample, which of the following strands is looped into nucleosomes?

dna without attached histones

rna primers

the 10-nm chromatin fiber

the 30-nm chromatin fiber

Explanation:

To determine which strand is looped into nucleosomes, we analyze each option:

• DNA without attached histones: Nucleosomes require histones, so this is incorrect.
• RNA primers: These are short RNA segments for DNA replication, not related to nucleosome formation.
• The 10 - nm chromatin fiber: The 10 - nm fiber is the "beads - on - a - string" structure where DNA is wrapped around histone octamers (nucleosomes).
• The 30 - nm chromatin fiber: This is a higher - order structure formed by the folding of the 10 - nm fiber, not the initial looping into nucleosomes.

Answer:

C. the 10 - nm chromatin fiber