Biology / Unit 2 Bio 0255 short lesson, about 20 seconds
Structure of a Eukaryotic Cell
Captions available
The idea
A eukaryotic cell adds a membrane-bound nucleus, numerous membrane-bound organelles, and several linear chromosomes to the four components every cell shares.
In practice
An animal cell's DNA sits enclosed by a nuclear membrane, while mitochondria and other organelles divide up its remaining work.
Where people slip
Compartmentalizing functions into organelles answers Bio 0253's size limit — not a coincidence of eukaryotic complexity.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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