Question 1
Multiple choiceEasy1 markDuring molecular visualization of chromatin, a student selects a DNA–protein unit for closer study. Which arrangement in the model represents a nucleosome?
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Answer: C. A nucleosome has DNA wrapped around a core of eight histone proteins, with an additional histone attached to linker DNA.
A: uses seven histone proteins in the core instead of eight. B: places the additional histone on the core rather than on linker DNA. D: omits the additional histone attached to linker DNA.
Remember: distinguish the eight-protein core from the additional linker-associated histone.