EX 11

Question 1

• chemically heterogenous family of biomolecules
• not defined by a particular functional groups or structure
• share with almost all physical properties and not with chemical properties
• insoluble with polar solvents and soluble with nonpolar solvents
• contain many C–C and C–H bonds, thus resulting in their poor water solubility

Answer 1

LIPIDS

Question 2

• aka triglycerides
• esters of glycerol and fatty acids
• fats and fixed oils
• produced by Fischer esterifiation

Answer 2

TRIACYLGLYCEROL

Question 3

alcohol + acid =

Answer 3

ester & water

Question 4

• a triacylglycerol that is solid at room temperature
• more saturated fatty acids (saturated triacylglycerols)
• meat, milk, butter and cheese (animal sources)

Answer 4

FATS

Question 5

• a triacylglycerol that is liquid at room temperature
• more unsaturated fatty acids (unsaturated triacylglycerols)
• corn, cotton seed, safflower and sunflower (plant sources)

Answer 5

FIXED OILS

Question 6

fats that is not solid at room temp

Answer 6

cod liver oil

Question 7

fixed oil that is not liquid at room temp

Answer 7

theobroma cacao

Question 8

• esters of saturated fatty acid and high molecular weight monohydric alcohol
• very hydrophobic
• form protective coats in plants & animlas

Answer 8

WAXES

Question 9

produced by honey bees Apis mellifera

Answer 9

BEESWAX

Question 10

produced usually from sheep Ovis aries

Answer 10

LANOLIN

Question 11

produced from carnauba palm Copernicia prunifera

Answer 11

carnauba wax

Question 12

susbtitute for spermaceti; from jojoba Simmondsia chinensis

Answer 12

jojoba wax

Question 13

• sterols in animals
• provides rigidity and fluidity of the cell membrane

Answer 13

CHOLESTEROL

Question 14

sterols in plants

Answer 14

SITOSTEROL
STIGMASTEROL

Question 15

sterols in fungi

Answer 15

ERGOSTEROL

Question 16

formed due to the enzymatic resections of primary metabolites

Answer 16

TERPENES & TERPENOIDS

Question 17

consist of five carbon isoprene units which are assembled to each other (many isoprene units) by many ways

Answer 17

TERPENES

Question 18

are divided into monoterpenes, sesquiterpenes, diterpens, sesterpenes, and triterpenes depending on carbon units

Answer 18

TERPENOIDS

Question 19

PHOSPHATE test is also known as

Answer 19

molybdate test

Question 20

detect the presence of phosphate

Answer 20

PHOSPHATE TEST

Question 21

it differentiates fat and cholesterol (negative) and phospholipid (positive)

Answer 21

PHOSPHATE TEST

Question 22

PHOSPHATE TEST

result

Answer 22

purple color

Question 23

ACROLEIN TEST

result

Answer 23

pungent smell & black color

Question 24

differentiate lecithin from cholesterol

Answer 24

ACROLEIN TEST

Question 25

detects **cholesterol**

Answer 25

LIBERMANN-BURCHARD TEST

Question 26

# **LIBERMANN-BURCHARD TEST** result

Answer 26

green color