Biomolecules

What are proteins made up of?

• glucose

• glycerol

• amino acids

• fatty acids

What are the elements that make up an amino acid?

(You may select more than one answer.)

• carbon

• sulfur

• oxygen

• nitrogen

A food sample is known to contain fats.

What will the student observe when a ethanol emulsion test is performed on it?

• The solution remains clear.

• A brick red precipitate is formed

• A cloudy white emulsion is formed.

• A violet colouration is formed.

What is the role of fats in living organisms?

(You may select more than one answer.)

• Insulation

• Energy source and store

• Make hormones

• Solvent for fat-soluble vitamins

in a fat molecule, which component serves as an attachment for fatty acids to bind?

Which bond is responsible for linking amino acids together in a protein?

Compared to carbohydrates, lipids yield more energy per gram

• True

• False

Complex carbohydrates must be broken down into simple sugars before they can be absorbed by the body.

• True

• False

In a triglyceride molecule, which type of reaction attaches the building blocks together?

Fats are soluble in water

• True

• False