DNA is tightly packaged inside the nuclei of our cells. According to the book "Molecular Biology of the Cell," fitting DNA inside the nucleus of a human cell is comparable to fitting 40 km (24 mi) of fine thread inside a tennis ball! The DNA is folded into coils by proteins that keep it from becoming too tangled, while also leaving access points open for crucial enzymes.
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Key Facts In This Video
The human brain produces enough electricity to power a small light bulb. 00:33
A human heart beats about 100,000 times per day. 02:58
The DNA in your cells would stretch all the way to Pluto and back if uncoiled. 05:10
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