Lipids

Question 1

Monomer

Answer 1

Lipids do not have a monomer, they are always polymers

Question 2

Lipid polymer structure

Answer 2

Glycerol Backbone (also called Head) and fatty acid tails. Tails are bonded through non polar covalent bond

Question 3

Phospholipid

Answer 3

Head is glycerol and phosphate, 2 fatty acid tails

Question 4

Triglyceride structure

Answer 4

Glycerol head, 3 fatty acid tails

Question 5

Why do lipids not dissolve in water?

Answer 5

The tails and main parts of all lipids are non polar. Due to their lack of charge makes them unattractive to water. Though there may be polar elements to some lipid molecules, it is the overall polarity of the molecule that matters

Question 6

Lipid Role In Body

Answer 6

Protection for structures (cell membrane made of phospholipids), long term energy storage (adiposites) and heat insulation, and cell signaling (hormones are lipid based cell signaling mechanisms)

Question 7

Saturated Fatty Acids and Examples

Answer 7

Saturated with more hydrogens, solid at room temp due to their structure, which is linear and stacks easily. EX: Lard, Butter Cheese

Question 8

Unsaturated Fatty Acids and Examples

Answer 8

Less Hydrogen Atoms due to double bonds of carbons to each other– because the carbons are sharing Atoms with each other, they have less space to bond with Hydrogen atoms. Kinks in tails caused by double bonds. Liquid at room temp. EX: Vegetable Oils