lipids

Question 1

what are the two types of lipids?

Answer 1

triglycerides
phospholipids

Question 2

how are triglycerides formed?

Answer 2

a condensation reaction happens between one molecule of glycerol and three molecules of fatty acid

Question 3

what is the bond formed in triglycerides?

Answer 3

an ester bond

Question 4

what is the standard formula for fatty acids?

Answer 4

RCOOH

Question 5

where are phospholipids found?

Answer 5

in the cell membrane (phospholipid bilayer)

Question 6

what are phospholipids made of?

Answer 6

hydrophilic heads and hydrophobic tails

Question 7

are the hydrophilic heads polar or non - polar?

Answer 7

polar - so they can form bonds with water

Question 8

what are saturated lipids?

Answer 8

lipids that don’t contain carbon-carbon double bonds and are those found in animal fats.

Question 9

what are unsaturated lipids?

Answer 9

> they’re found in plants and contain carbon-carbon double bonds - this means that the molecule is able to bend.
unsaturated fats cannot pack together as tightly and so are liquid at room temp.

Question 10

what are the similarities and differences between triglycerides and phospholipids?

Answer 10

> both have one glycerol molecule
triglycerides have 3 fatty acids whereas phospholipids have 2 fatty acids plus a phosphate group