Biology / Unit 1 Bio 0205 short lesson, about 20 seconds
Steroids
Captions available
The idea
A steroid is a lipid built from four fused carbon rings rather than the long chains that make up fatty acids.
In practice
Cholesterol is a steroid, and its four-ring backbone is also the starting structure several hormones are built from.
Where people slip
A steroid's ring structure sets it apart from every other lipid in this unit, which are all chain-based instead.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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