3 8 lipids include fats which are mostly energy storage molecules n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
3.8 Lipids include fats, which are mostly energy-storage molecules PowerPoint Presentation
Download Presentation
3.8 Lipids include fats, which are mostly energy-storage molecules

Loading in 2 Seconds...

play fullscreen
1 / 12

3.8 Lipids include fats, which are mostly energy-storage molecules - PowerPoint PPT Presentation


  • 81 Views
  • Uploaded on

3.8 Lipids include fats, which are mostly energy-storage molecules. These compounds are composed largely of carbon and hydrogen They are not true polymers They are grouped together because they do not mix with water. Figure 3.8A. They are also called triglycerides

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '3.8 Lipids include fats, which are mostly energy-storage molecules' - lucy-rowland


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
3 8 lipids include fats which are mostly energy storage molecules
3.8 Lipids include fats, which are mostly energy-storage molecules
  • These compounds are composed largely of carbon and hydrogen
    • They are not true polymers
    • They are grouped together because they do not mix with water

Figure 3.8A

slide2

They are also called triglycerides

  • A triglyceride molecule consists of one glycerol molecule linked to three fatty acids
  • Fats are lipids whose main function is energy storage

Fatty acid

Figure 3.8B

le 5 11b

LE 5-11b

Ester linkage

Fat molecule (triacylglycerol)

slide4

These prevent them from solidifying at room temperature

  • Saturated fats (lard) lack double bonds
    • They are solid at room temperature
  • The fatty acids of unsaturated fats (plant oils) contain double bonds

Figure 3.8C

slide5
Fatty acids vary in length (number of carbons) and in the number and locations of double bonds
  • Saturated fatty acids have the maximum number of hydrogen atoms possible and no double bonds
  • Unsaturated fatty acids have one or more double bonds
  • The major function of fats is energy storage
le 5 12a

LE 5-12a

Stearic acid

Saturated fat and fatty acid.

le 5 12b

LE 5-12b

Oleic acid

cis double bond

causes bending

Unsaturated fat and fatty acid.

slide8
Fats made from saturated fatty acids are called saturated fats
  • Most animal fats are saturated
  • Saturated fats are solid at room temperature
  • A diet rich in saturated fats may contribute to cardiovascular disease through plaque deposits
3 9 phospholipids waxes and steroids are lipids with a variety of functions
3.9 Phospholipids, waxes, and steroids are lipids with a variety of functions
  • Phospholipids are a major component of cell membranes
  • Waxes form waterproof coatings
  • Steroids are often hormones

Figure 3.9

le 5 13

LE 5-13

Choline

Hydrophilic head

Phosphate

Glycerol

Hydrophobic tails

Fatty acids

Hydrophilic

head

Hydrophobic

tails

Space-filling model

Structural formula

Phospholipid symbol

3 10 connection anabolic steroids and related substances pose health risks
3.10 Connection: Anabolic steroids and related substances pose health risks
  • Anabolic steroids are usually synthetic variants of testosterone
  • Use of these substances can cause serious health problems

Figure 3.10

paper lipid synthesis activity using the paper folding diagram for lipid do the following
Paper Lipid Synthesis Activity: Using the paper folding diagram for lipid, do the following…
  • What two compounds are needed to synthesize a lipid?
  • How many carbon atoms does glycerol contain?
  • Place an asterisk(s) (*) on the glycerol molecule to indicate the location where a dehydration synthesis could occur to synthesis a triglyceride.
  • How many fatty acid molecules are found on the folding diagram? Number each fatty acid molecule on the paper. Identify each as a saturated or unsaturated fatty acid.
  • How does cholesterol’s structure differ from a triglyderide?
  • What would need to draw on the folding diagram if you wanted to make a phospholipid?

If time permits, construct (3) additional questions and answer them.