lipids

Question 1

what are lipids made from?

Answer 1

hydrogen, carbon and oxygen

Question 2

what is a triglyceride made from?

Answer 2

glycerol and 3 fatty acids

Question 3

how are triglycerides formed?

Answer 3

by condensation reactions

Question 4

what bonds are formed and what is released when a triglyceride is formed?

Answer 4

3 ester bonds are formed and 3 molecules of water are released

Question 4

describe fatty acids

Answer 4

head which is hydrophilic, long tails made up of hydrocarbons that are hydrophobic

Question 5

what is the function of a triglyceride?

Answer 5

an energy storage molecule that is insoluble

Question 6

what is a phospholipid made from?

Answer 6

glycerol, phosphate and 2 fatty acids

Question 7

is the phosphate group hydrophilic or hydrophobic

Answer 7

hydrophilic

Question 8

what is a saturated fatty acid?

Answer 8

a fatty acid that doesn’t have any double bonds

Question 9

what is an unsaturated fatty acid?

Answer 9

a fatty acid that has at least one double bond

Question 10

where are phospholipids found?

Answer 10

in the cell membrane

Question 11

describe the emulsion test for lipids

Answer 11

shake substance with ethanol
shake substance with water
positive result: milky, cloudy emulsion