Lipids

Question 1

what is a lipid?

Answer 1

non polar energy molecules that are hydrophobic

hydrophpbic cause there is no charge wanting to mix with h2o

Question 2

what is a fatty acid?

Answer 2

• the monomer of a lipid
• chain of carbon and hydrogen
  -inlcudes carboxylic end

Question 3

what is a carboxylic end?

Answer 3

the end of a molecule with COOH

Question 4

what is a saturated fatty acid?

Answer 4

one with no double bonds

solid at room temperature (produced by animals)

Question 5

what is an unsaturated fatty acid?

Answer 5

• one with double bond
• hydrogen on same side (bent molecule)

liquid in room temperature (produced by animals)

Question 6

Transfat

Answer 6

• double bonds
• hydrogen on opposite sides (straight molecule)

solid room temp (animal produced)

Question 7

what is a neutral fat?

Answer 7

Glycerol plus one or more fatty acids

formed by dehydration synthesis

Question 8

what does a triglyceride include?

Answer 8

• one glycerol
• 3 fatty acids

Question 9

what functions do glycerides provide?

Answer 9

• energy supply/storage
• insulation for temp changes

Question 10

what is a phospholipid?

Answer 10

variation of neutral fat with a glyceride and one fatty acid replaced with a phosphate group

Question 11

is phospholipid polar or non polar

Answer 11

both
polar: on the phosphate
N-polar: on the glycerol + fatty acids

Question 12

is the phosphate of a phospholipid hydrophbic or philic?

Answer 12

Hydrophilic because it’s polar

it will accept other H2O’s

Question 13

Is the Non-p tail of a phospholipid philic or phobic

Answer 13

Hydrophobic

no charges looking for other molecules

Question 14

what is a steroid?

Answer 14

a variation of neutral fat

Question 15

How are neutral fats formed?

Answer 15

Dehydration synthesis

Question 16

what is the structure of a steroid

Answer 16

• non polar ring

ex. hormones, cholesterol