Biological Molecules

What are the chemical elements which make up fats?

• carbon, hydrogen, oxygen

• carbon, nitrogen, oxygen

• hydrogen, oxygen, nitrogen

• hydrogen, carbon, nitrogen

What is the main role of fats?

• an immediate energy source

• a long term energy source

• for growth

• for repair

Which food test should be used to test for the presence of maltose?

• Iodine test

• Benedict's test

• Ethanol Emulsion test

• Biuret test

Which food test involves the use of sodium hydroxide?

• Benedict's Test

• Biuret Test

• Iodine Test

• Ethanol-emulsion test

How much Benedict's solution should be added to 3 cm3 of food solution in the test tube?

• 2 cm3

• 1 cm3

• a few drops

• 3 cm3

Which is the basic unit of polypeptides?

• glucose

• amino acids

• fatty acids

• glycerol

Which molecule can form when many units of glucose join together?

• protein

• glycogen

• maltose

• fats