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.
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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