Question

1)Which of the following is FALSE regarding lipids?

Select one:

a. They often are polymers of fatty acids

b. They have a low oxygen to carbon content

c. They are nonpolar molecules

d. They are used solely as fuel for the body

e. They include cholesterol molecules

2) Trans fat

Select one:

a. Contribute more to cardiovascular disease than cholesterol does

b. Lower the LDL in our bodies

c. Are a form of cholesterol

d. Dissolve in water

e. Are saturated fatty acids

Answer 1

1. The lipids comprise of fats and oils which are made up of fatty acids attached to glycerol backbone. They have very less oxygen molecules which are present in the carboxyl group of fats and the rest of the lipid is carbon hydrogen backbone and hence it has low oxygen to carbon content and also is nonpolar in nature. They include cholesterol, sphingolipids, waxes etc.,. They are used as fuel for the body and also as the building blocks of the membrane for various organelles. Hence the false statement is: d. They are used solely as fuel for the body.

2. Trans fats are fats that have a double bond in the odd numbered carbon positions and hence are unsaturated fatty acids. As they are nonpolar in nature cannot dissolve in water and they are not a form of cholesterol. They increase the LDL levels in the bodies and hence contribute to the generation of cardiovascular disease more than cholesterol does. Hence the correct answer is: a. Contribute more to cardiovascular disease than cholesterol does.

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