DNA within the cell is wrapped around nucleosomes to form chromatin. When chromatin is in the form of a 30 nm fibril, how many copies of H1 and H2A histone proteins would be found in a stretch of chromatin containing 20 nucleosomes?
a. 40 H1, 20 H2A
b. 20 H1, 40 H2A
c. 40 H1, 40 H2A
d. 10 H1, 30 H2A
e. 20 H1, 20 H2A
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