Lipids

Question 1

one of the major biomolecules in living cells have no common structure unlike proteins, carbohydrates,
and nucleic acids

Answer 1

Lipids

Question 2

lipids can be divided into? 3 types

Answer 2

simple, compound and derived lipids

Question 3

are esters of fatty acids and alcohol.

Answer 3

simple lipids

Question 4

are esters of fatty acids and alcohol that contain other functional group.

Answer 4

compound lipids

Question 5

are lipids that contain
hydrocarbon rings and a long hydrocarbon side
chain.

Answer 5

derived lipids

Question 6

The building blocks of lipids differ from each type but the

most common is the

Answer 6

fatty acid

Question 7

used to detect the presence of unsaturated fatty acid or the amount of double bond in a liquid sample

Answer 7

Unsaturation test

Question 8

used to detect the glycerol as indicated by the formation of propenal or acrolein that has the pungent color.

Answer 8

Acrolein test

Question 9

substances fully mix in all proportions. Ex: Alcohol and water

Answer 9

Miscible

Question 10

substances never fully mix in any proportions. Ex: Oil and water

Answer 10

immiscible

Question 11

the simplest a,B-unsaturated aldehyde. it has been known as lachrymator and the vapor that causes eye, nose and throat irritation.

Answer 11

Acrolein

Question 12

are esters that can be hydrolyzed under basic conditions. Able to be converted into soap by the treatment of alkali.

Answer 12

saponifiable lipids

Question 13

the only non-saponifiable in egg yolks.

Answer 13

cholesterol

Question 14

a test for carbohydrates

Answer 14

Molisch test

Question 15

reagents for Molisch test

Answer 15

alpha-naphthol in ethanol, concentrated sulfuric acid (h2so4)

Question 16

a test for molecules with a free amino Alpha group that reacts together with the ninhydrin reagent

Answer 16

ninhydrin test

Question 17

ninhydrin positive result color

Answer 17

blue-blue violet color

Question 18

acts as powerful oxidizing agent; it undergoes oxidative deamination; followed by condensation

Answer 18

ninhydrin

Question 19

a test for free phosphate groups

Answer 19

phosphate test

Question 20

phosphate test reagent:

Answer 20

2.5% ammonium molybdate and HNO3

Question 21

Phosphate test

Positive result:

Answer 21

presence of yellow precipitate (ammonium phosphomolybdate)

Question 22

test for cholesterol

Answer 22

Salkowski test

Question 23

Salkowski test

Reagent:

Answer 23

concentrated h2so4 (sulfuric acid)

Question 24

Salkowski test

Positive result:

Answer 24

yellow to brick red