Finals: Post lab

Question 1

These are structurally diverse organic compounds obtained from living organisms

Answer 1

lipids

Question 2

1. derived from fatty acids
   * e.g. fats and waxes which contain ester linkages and can be hydrolyzed.

Answer 2

hydrolyzable lipids

Question 3

e.g. cholesterol and other steroids which don’t have ester linkages and can’t be hydrolyzed.

Answer 3

non-hydrolyzable

Question 4

Carboxylic acids (RCOOH) with long carbon chains of 12-20 carbon atoms.

Answer 4

fatty acid

Question 4

Saturated fatty acids have

Answer 4

hydrocarbon chains connected by single bonds only and is solid at room temperature.

Question 4

Unsaturated fatty acids have

Answer 4

one or more double bonds, are liquid at room temperature

Question 4

Most common unsaturated fatty acids are

Answer 4

linoleic and linolenic acids

Question 4

contain one double bond between carbon atoms

Answer 4

Monounsaturated

Question 5

1. Derived from fatty acids having larger number of double bonds
2. Have lower melting points liquids at room temperature

Answer 5

oils

Question 5

Almost 90% of dietary lipids are composed mainly of

Answer 5

Triacylglycerols-dietary lipids

Question 5

it contains several double or triple bonds between carbon atoms

Answer 5

Polyunsaturated

Question 6

1. Derived from fatty acids having few double bonds

2.Have higher melting points solids at room temperature

Answer 6

fats

Question 7

A non polar organic solvent used in this experiment to extract lipids from potato chips

Answer 7

Petroleum ether

Question 8

Light,volatile,petroleumfraction predominantly composed of aliphatic hydrocarbons

Answer 8

Petroleum ether