4. Nutrients Revision

Which of the following are roles of proteins?

• synthesis of new protoplasm

• synthesis of enzymes and some hormones

• formation of antibodies

• a source and store of energy

Which of the following is a disaccharide?

• amylase

• galactose

• maltose

• starch

Which of the following is NOT a polysaccharide?

• cellulose

• glucose

• glycogen

• starch

One molecule of fat can be broken down into one molecule of ____________ and three molecules of fatty acids.

An unknown nutrient has the elements carbon, hydrogen, oxygen, and nitrogen. Which of the following is most likely the identity of this nutrient?

• fat

• protein

• sucrose

• water

Which of the following tests for the presence of proteins?

• Benedict's test

• Biuret test

• Ethanol emulsion test

• Iodine test

Which substance will not yield a positive test with Benedict's solution?

• glucose

• fructose

• maltose

• sucrose

An unknown substance was tested with ethanol emulsion test.

Which of the test tubes show the presence of fats?

• left

• right

Which of the following substances will give a violet colour when tested with Biuret solution?

• butter

• celluose

• maltase

• glycogen