Lipid quiz

Question 1

Lipids: hydrophobic or hydrophilic?

Answer 1

-Not soluble in water (hydrophobic)

Question 2

What are lipids made of?

Answer 2

Hydrocarbon chains (chains of c and h)

Question 3

What are the three categories of lipids?

Answer 3

fats steroids and phospholipids

Question 4

What are lipids used for?

Answer 4

energy storage

Question 5

Are lipids polymers?

Answer 5

No, but they are large

Question 6

What are the building blocks of lipids?

Answer 6

Glycerol and triglyceride

Question 7

What is a fat’s structure?

Answer 7

• Glycerol and fatty acids
• Triglycerides have 3 fatty acids
• fatty acids present may vary

Question 8

What is a fat’s function?

Answer 8

• Compact energy source
• Cushions vital organs
• provides insulation

Question 9

What is a saturated fat?

Answer 9

a fat with no double bonds between carbons. It has a straight chain

Question 10

Characteristics of saturated fats?

Answer 10

• solid at room temp
• straight chains allow for tight packing
• Most animal fats

Question 11

Examples of saturated fats

Answer 11

lard and butter

Question 12

What is an unsaturated fat?

Answer 12

At least one double bond b/w carbons. Hydrocarbon chain is bent.

Question 13

characteristics of unsaturated fats?

Answer 13

liquid at room temp

• bent chain prevents tight packing
• most plant fats

Question 14

Examples of unsaturated fats

Answer 14

oils, fish oils. veggie oil

Question 15

steroids

Answer 15

consists of 4 fused carbon rings
-three are 6-sided
-One is 5-sided
(all steroids have some basic structure

Question 16

Examples of steroids

Answer 16

Cholesterol and testosterone

Question 17

Characteristics of cholesterol

Answer 17

• precursor of other steroids
• component of animal cell membranse
• contributes to artereosclerosis

Question 18

What is hydrophobic and makes up tail of phospholipid

Answer 18

2 fatty acids

Question 19

What is the difference between a phospholipid head and tail?

Answer 19

Head is hydrophilic and polar. Tail is hydrophobic non polar.

Question 20

Why are lipids insoluble?

Answer 20

They are made of long chains of hydrocarbon chains which are nonpolar, but water is polar, so they will not interact.

Question 21

Consists of glycerol and three fatty acids

Answer 21

fat

Question 22

energy source

Answer 22

fat

Question 23

cushions and insulates

Answer 23

fat

Question 24

consists of glycerol, 2 fatty acids, and a phosphate group

Answer 24

phospholipid

Question 25

triglycerides

Answer 25

fat

Question 26

part of the molecule is hydrophilic and the other part is hydrophobic

Answer 26

phospholipid

Question 27

major component of cell membranes

Answer 27

phospholipid

Question 28

consists of four fused carbon rings, three 6 sided rings and one 5 sided ring

Answer 28

steroid

Question 29

1 or more double bonds

Answer 29

unsaturated fat

Question 30

usually solid at room temp

Answer 30

saturated fat

Question 31

molecules are tightly packed

Answer 31

saturated fat

Question 32

usually liquid at room temperature

Answer 32

unsaturated fat

Question 33

most plant fats

Answer 33

unsaturated fat

Question 34

most animal fats

Answer 34

saturated fats

Question 35

Why aren’t unsaturated fats solid at room temp?

Answer 35

Hydrocarbon kinks cause unsaturated fats to be bent, so they cant pack in closely