lipids

Question 1

4 uses of lipids

Answer 1

insulation (thermal and electrical)
energy source + store
protection
steroid hormones from cholesterol

Question 2

what steroid hormones from cholesterol are there

Answer 2

testosterone
oestrogen
progestrone

Question 3

how do elements in lipids compare to elements in carbs

Answer 3

the same except less oxygen

Question 4

describe the structure of a phospholipid

Answer 4

polar, hydrophilic head
hydrophobic tails

Question 5

define hydrophilic

Answer 5

attracted to water

Question 5

define hydrophobic

Answer 5

repels water

Question 6

monoglycaride

Answer 6

1 fatty acid + 1 glycerol molecule

Question 7

triglycaride

Answer 7

3 fatty acids + 1 glycerol molecule

Question 8

2 features of triglycerides

Answer 8

insoluble - hydrophobic tails
not polar - evenly distributed charges

Question 8

how is a triglyceride formed

Answer 8

glycerol + fatty acid in a condensation reaction forming 3 ester bonds

Question 9

when are fatty acids solid + examples

Answer 9

longer chain
animal fats butters

Question 10

when are fatty acids liquids + examples

Answer 10

shorter chain
contain doble c=c bonds
oils in plants
unsaturated