biological molecules 2

Question 1

2 types of lipids

Answer 1

triglyceride and phospholipids

Question 2

structure of triglycerides

Answer 2

1 glycerol molecule and 3 hydrocarbon fatty acids that form the tail

Question 3

basic structure of the triglyceride

Answer 3

o=c-r
ho/( connected to c)
o=, ho and c make up carboxylic acid and the r is the tail with can vary

Question 4

draw example of triglycerol formed by condensation

Question 5

what is the bond formed in the process

Answer 5

ester bond

Question 6

define saturated

Answer 6

single bonds inbetween carbons

Question 7

define unsaturated

Answer 7

atleast one double double carbon bond in the chain

Question 8

difference between polyunsaturated and monunsaturated

Answer 8

poly- many double double carbon bonds
mono-only one double double carbon bond

Question 9

define phospholipid

Answer 9

a bilayer in a cell membrane

Question 10

structure

Answer 10

sames as triglycerides but a phospate group attached to the glycerol and only 2 fatty acids attached

Question 11

what does the phospate group do

Answer 11

the phospate group is hydrophillic which means its attracted to water

Question 12

what properties do the hydrocarbon tails have

Answer 12

teh tails are hydrophobic, so the repel water which means they are insoluable in water

Question 13

structure of the bi layer- draw

Answer 13

outside is the hydrophillic phospate group and inside is the hydrophobic tails so anything soluble in water for cant pass through

Question 14

what are triglycerides used for

Answer 14

energy storage molecules

Question 15

describe the emulsion test

Answer 15

3 shake food substance it 2cm^3 of ethanol
pour into distiled water without food substance
milky cloudy colour means fat is present