lipids

Question 1

structure of a triglyceride

Answer 1

1 glycerol, 3 fatty acids and 3 molecules of water produced through condensation reactions

Question 2

bonding in tryglycerides

Answer 2

ester

Question 3

why are triglyerides good energy stores

Answer 3

the long fatty acid tails contain chemical energy

Question 4

why are triglycerides insoluble in water

Answer 4

the tails are hydrophobic (water-repelling) so that osmosis is not affected

Question 5

difference between saturated and unsaturated

Answer 5

saturated is there are no C=C double bonds present and unsaturated if there are C=C double bonds present

Question 6

features of triglycerides

Answer 6

good energy store, insoluble in water

Question 7

structure of a phospholipids

Answer 7

phosphate group, glycerol and 2 fatty acid tails

Question 8

how is a phospholipid bilayer formed

Answer 8

phosphate group is hydrophillic (water ‘liking’)
tails are hydrophobic (water repellent) so water substances can’t pass through hydrophobic middle easily

Question 9

function of phospholipids

Answer 9

building membranes