lipids,trigylcs,fatty acids

Question 1

elements in lipids

Answer 1

carbon, hydrogen, oxygen

Question 2

what are lipids

Answer 2

NOT polymers

Question 3

properties

Answer 3

1)non polar
2)insoluble in water
3)but dissolve easily in organic solvents

Question 4

function

Answer 4

1)main part of cell membrane
2)energy source
3)insulation,protection, waterproof layer around main organs

Question 5

make up of triglycerides

Answer 5

1 glycerol, 3 fatty acids attached to it

Question 6

how many hydroxyl groups in glycerol

Answer 6

3- they combine w a fatty acid making a triglyc

Question 7

how much water is made in forming triglycs

Answer 7

3 mols of water

Question 8

name of bonds between -OH in glyc and -COOH in fatty acids

Answer 8

ester bond

Question 9

structure relating to function (in triglycs)

Answer 9

1)low mass to energy ratio=good storage mols as sm energy in a small space
2)large+non polar+insoluble in water=no osmotic affect+can clump together

Question 10

saturated fatty acid

Answer 10

1)only single bonds between C atoms
2)mols align so solid at room temp
3)straight

Question 11

unsaturated fatty acid

Answer 11

1)atleast 1 double C bond
2)not straight due to double bond
3)cannot align so more liquidy

Question 12

test for lipids

Answer 12

ethanol emulsion test, gently shake+water

Question 13

make up of phospholipids

Answer 13

1 glycerol, 2 fatty acids, 1 phosphate head

Question 14

what makes phospholipids different to triglycerides?

Answer 14

1)their make up
2)phosphos have a hydrophillic head and hydrophobic tails
3)phosphos form a bilayer