• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Lipids opt 1
 

Lipids opt 1

on

  • 1,403 views

 

Statistics

Views

Total Views
1,403
Views on SlideShare
1,403
Embed Views
0

Actions

Likes
0
Downloads
3
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Lipids opt 1 Lipids opt 1 Presentation Transcript

    • AS Biology Core PrinciplesLipids 100’s of free ppt’s from www.pptpoint.com library
    • Aimso Elements of lipidso Structure of glycerol & fatty acidso Condensation reactions to form triglycerideso Phospholipids
    • Introduction to lipids
    • Introduction to lipidso Lipids contain the elements carbon, hydrogen and oxygen.o They have numerous functions, primarily energy stores in animals and plants.o Lipids consist of two types of molecules - glycerol & fatty acids.
    • Glycerolo A molecule of glycerol is made up of three carbon atoms.o Each of these has a hydroxyl group attached to it.o Hydrogen atoms occupy the remaining positions.
    • Fatty Acids
    • Fatty Acidso A single fatty acid molecule contains an acid (COOH) group attached to a hydrocarbon chain.o Hydrocarbon usually denoted by the letter ’R’.o Saturated = If every carbon atom in the chain is joined by a single C-C bond.o Unsaturated = at least one C=C bond.o Polyunsaturated = many double bonds.o Most animal fats are saturated while most plant fats are unsaturated.
    • Triglycerides
    • Triglycerideso A triglyceride molecule is made of a glycerol molecule and three fatty acids.o The molecules join together through the process of condensation losing a molecule of water each time a link is made.o The link between the glycerol molecule & each fatty acid is an ‘Ester Link’.o The fatty acids in a lipid molecule can differ in length and can be saturated or unsaturated.
    • Triglycerides
    • Phospholipidso In phospholipids one of the fatty acids of a triglyceride is substituted by a phosphate group.
    • Phospholipids
    • Phospholipids
    • Lipids & watero Triglycerides and phospholipids have hydrophobic and hydrophilic groups. o What does this mean? o To what use is this feature put in biology?
    • More Infoo To make further notes on Lipids : o Pages 11 & 12 in Collins o Pages 69 - 71 Roberts o www.mrothery.co.uk o www.learn.co.uk o www.bbc.co.uk/education/asguru/