lipids

Question 1

what triglycerides formed from?

Answer 1

a glycerol molecules and three fatty acids

Question 2

what are the uses of lipids?

Answer 2

energy storage, heat protection and protection

Question 3

how is a triglyceride formed?

Answer 3

via a condensation reaction and an ester bond is formed

Question 4

what are the two types of fatty acids?

Answer 4

saturated and unsaturated

Question 5

describe saturated fatty acids

Answer 5

they contain single bonds between carbon atoms = long and straight

Question 6

describe unsaturated fatty acids

Answer 6

contain double bonds between carbon atoms = create kinks between the chains

Question 7

what is a phospholipid?

Answer 7

a lipid with a phosphate molecule, two fatty acids and glycerol.

Question 8

what does the phosphate group do to the lipid?

Answer 8

it increases solubility because it’s polar

Question 9

why are phospholipids amphipathic?

Answer 9

the head is hydrophophilic and the tail is hydrophobic

Question 10

what is the function of phospholipids?

Answer 10

makes up the bilayer of cell membranes = centre is hydrophobic = water soluble substances can’t pass through