Lipids

Question 1

Lipids characteristics

Answer 1

Macromolecules - not polymers
Non polar
Insoluble in we’re
Dissolve in organic solvents
Hydrophobic

Question 2

How triglyceride and phospholipid made

Answer 2

Triglyceride - glycerol molecule and 3 fatty acids
Phospholipids - phosphate group, glycerol molecule, 2 fatty acids

Question 3

What bond forms in triglyceride and phospholipid

Answer 3

Ester bonds

Question 4

What are R groups

Answer 4

Fatty acids which can be unsaturated or saturated

Question 5

Saturated fatty acids

Answer 5

Hydrocarbon chain only has single bonds between carbon atoms

Question 6

Unsaturated fatty acids

Answer 6

Chain has 1 or more double bonds between carbon

Question 7

Triglcycerides can

Answer 7

Transfer energy
Act as metabolic water source
Won’t affect water potential and osmosis
Many affect without affecting mass

Question 8

Components of phosphlipid

Answer 8

Hydrophilic head - negative charge attracts to water and repels other fats
Hydrophobic tail - no charge and repels water

Question 9

Cholesterol made of

Answer 9

Sterols have four carbon rings and hydroxyl group at one end
Hydrophobic and hydrophilic regions

Question 10

What does cholesterol do to membrane fluidity

Answer 10

Decrease fluidity when hot
Increase fluidity when cold