Regents Biology

LipidsConcentrated energy molecules

Regents Biology

Lipids – General Info

Lipids are composed of C, H, O long hydrocarbon chains (H-C)

“Family groups” fats phospholipids steroids Waxes

Two Types

Saturated Fats and Unsaturated Fats

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Lipids Functions:

1. energy storage twice the energy as carbohydrates!

2. build cell membrane phospholipids

3. cushions organs

4. insulates body

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Structure of Fat Molecule - Triglyceride

not a chain - just a “big fat molecule”

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Saturated fats vs. Unsaturated fats

Most animal fats solid at room

temperature

Limit the amount in your diet contributes to heart

disease

Plant, vegetable & fish fats liquid at room

temperature

I like Olive Oil

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Hydrophilic heads “attracted” to H2O

Hydrophobic tails “hide” from H2O

bilayer

water

water

Other lipids in biology - Phospholipids

It’s just like ame!!!!

head at one end& a tail

at the other!

Regents Biology 2003-2004

Other lipids in biology - Steroids Example – cholesterol Example - hormones

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Other lipids in biology - Waxes Waxes are a great to to repel water

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What, are youLipid or somethingWinter is coming