Lipids

Question 1

which part of a phospholipid I hydrophilic?

Answer 1

the phosphate head

Question 2

which part of the phospholipid is hydrophobic?

Answer 2

the fatty acid tails

Question 3

how many fatty acid tails does a triglyceride have?

Answer 3

3

Question 4

what is a triglyceride used for?

Answer 4

energy storage, insulation and protection

Question 5

where are triglycerides found?

Answer 5

in fatty acid issue under skin and around organs

Question 6

what are lipids good for?

Answer 6

energy storage

Question 7

what is another name for lipids?

Answer 7

fats or oils

Question 8

what makes a fatty acid saturated?

Answer 8

it is formed in straight chains that line up against each other so form attractions between all the molecules. this means there is more energy to break the bonds meaning saturated fats are solid at room temperature.

Question 9

what makes a fatty acid unsaturated?

Answer 9

it is formed in bent chains so cant lay flat on top of each other and therefor can’t form bonds between each other. this means there is less bonds to break so less energy is needed. this means that they are liquid at room temperature

Question 10

what does organic mean?

Answer 10

it means that substance ahs carbon in it

Question 11

what is the most common type of lipid?

Answer 11

triglyceride

Question 12

what do triglycerides contain?

Answer 12

carbon, hydrogen and oxygen (higher carbon, lower oxygen)

Question 13

what bond is formed between the glycerol head and the fatty acid tails?

Answer 13

ester bond

Question 14

what is the process called when a bond is formed between the fatty acid tails and the glycerol head?

Answer 14

esterification

Question 15

what reaction takes place to bond the fatty acid to the glycerol head?

Answer 15

condensation

Question 16

what reaction would need to occur to separate the glycerol head from the fatty acid tails?

Answer 16

hydrolysis

Question 17

what structure do lipids form?

Answer 17

a bilayer structure

Question 18

describe how the lipids are placed in the bilayer.

Answer 18

the hydrophilic phosphate head is placed oh the outside of the bilayer and the hydrophobic fatty acid tails are placed on the inside of the head

Question 19

what role does cholesterol play?

Answer 19

formation of membranes

Question 20

where is cholesterol found?

Answer 20

it is positioned between phospholipids adding stability

Question 21

what is the function of cholesterol?

Answer 21

regulates the membrane fluidity. it stops them from becoming too fluid at high temperature and increases fluidity at low temperatures