Biology AQA 3.1.3 Plasma Membranes

Glycerol and Fatty Acids combine by condensation to produce triglycerides

The R group of a fatty acid determines if it is saturated or unsaturated.Saturated- long chain (bad)Unsaturated- Singular (Good)Less clogging and formation of atheroma.

Phospholipid:Fatty Acid----GlycerolFatty Acid----GlycerolPhosphate----Glycerol

Hydrophobic TailHydrophilic Head

EMULSION TEST FOR LIPIDS:Add ethanol to solutionShake solutionAdd waterSee if a precipitate is formed.

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ROLE OF THE MICROVILLI:To increase the surface area of the small intestine to increase the rate of diffusion, as the partially permeable membrane covers more areas and allows a high concentration of molecules to pass over.

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