What Is Meant by the "Beads on a String" Model

question 30

Multiple Choice

What is meant by the "beads on a string" model of chromatin?

• A)The beads are the histones, and the string is the transcriptionally active DNA loops.
• B)The beads are the nucleosomes, and the string is the linker DNA.
• C)The beads are molecules of DNA polymerase that attach to the DNA string.
• D)The beads are ribosomes, and the string is the mRNA that has been transcribed from active chromatin.
• E)The beads are the heterochromatic regions that are tightly compacted, and the strings are euchromatic regions that are being actively transcribed.

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