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Presentation transcript:

Set up Paper for Cornell Notes LIPIDS

A student preparing for a hike wants to pack a snack that has biomolecules that provide quickly available energy but few excess calories. Which nutrition label lists the best combination of biomolecules that provide quickly available energy while providing the fewest calories from other types of biomolecules?

Monomer:

Examples- who am i Fats Oils Steroids Waxes Vitamins

What’s a lipid? (who am I) Non-polar (no charge) organic molecules Insoluble in water (Doesn’t mix with water) Hydrophobic= water fearing Made of C,H,O Ratio is usually greater than 2:1 Hydrogen to Oxygen

Functions - What do I do? Biological membranes Store long term energy Insulation Cushion Waterproofing Fat soluble Vitamins Steroids (sex hormones)

Where am I made? Lipids are made in the smooth endoplasmic reticulum

Monomer - Fatty acids Solid at room temperature. (bad for us!) Saturated fatty acid- single bonds, straight and tightly packed. Solid at room temperature. (bad for us!) Unsaturated fatty acid- double bonds bend the tails and it’s crooked (not straight). Liquid at room temperature (ex. Olive Oil)

Which is saturated? Which is unsaturated?

Which is saturated? Which is unsaturated?

Phospholipids (Cell membranes) Steroids (Sex hormones) Waxes Types of lipids Triglycerides Phospholipids (Cell membranes) Steroids (Sex hormones) Waxes Vitamins (fat soluble A, D, E, & K)

E 1. Triglyceride Made of one glycerol head and 3 fatty acids Looks like the letter E A typical fat- stored in your body for long term energy

2. phospholipids One phosphate group and 2 fatty acid chains Makes up the cell membrane of all organisms- makes a bilayer that controls what comes into cell

3. Steroids and Vitamins No fatty acid chains Has 4 carbon rings Makes up some hormones and vitamins (testosterone, progesterone, & estrogen) 4 linked carbon rings – 3 hexose, 1 pentose

Cholesterol Made in the liver – Precursor to all steroids

But sometimes they look like this: In general… Lipids are long chains of carbon and hydrogen: But sometimes they look like this: