Mai Nguyen

Lipids are organic compounds which are

• Soluble in water

• Soluble in organic solvents

• Insoluble in organic solvents

• Soluble in polar solvents

Lipids serve as

• fuel molecules

• signal molecules

• components of membranes

• All above options.

Lipids are used in

• Cosmetics

• Foods

• Medicines

• All above options

Lipids are consumed through foods such as

• Eggs

• Meats

• Grains and nuts

• Vegetable oils

• All above options

Lipids are classified into

• Fatty acids, Glycerides, nonglycerides and complex lipids

• Saturated and unsaturated acids

• Neutral glycerides and phosphoglycerides

• All options are wrong

They are long hydrocarbon chain organic acids with a

• terminal carboxyl group (-COOH).

• terminal amine group (-NH2).

• terminal carbonyl group (-CHO).

• terminal peptide group (-CO-NH-)

Fatty acids are divided into

• Saturated and unsaturated acids

• Long and short acids

• Simple and complex acids

• All above options.

Saturated fatty acids have

• No double bonds to other carbon atoms

• Solid at room temperature

• High melting point

• All above options.

Unsaturated fatty acids have

• At least one double bonded set of carbon atoms

• Liquids at room temperature

• Low melting points

• All above options

Sources of linoleic acid:

• All below options

• Vegetable oils (seasame, corn oil, sunflower, soybean)

• Leafy vegetables, nuts

• Poultry fat.