How does DNA fit inside the nucleus of a eukaryotic cell?
a. The cell breaks the strands apart to form nucleosomes.
b. The DNA is wrapped around histones to form nucleosomes.
c. The DNA is supercoiled beyond the double helix structure.
d. The cell scaffolds the strands to make them more compact.
b. The DNA is wrapped around histones to form nucleosomes.
DNA fits inside the nucleus of a eukaryotic cell by wrapping around proteins known as histones, which creates structures known as nucleosomes. They are linked together by a short strand of DNA that has no histones, creating a “beads on a string” structure.
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Contractions of the dome-shaped __________ and
the intercostal muscles between the ribs alter the volume of the thoracic cavity during breathing. Fill in the blank(s) with the appropriate word(s).
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