Which substance is made up of amino acids?

• Fats

• Pepsin

• Urea

• Glycogen

Starch and cellulose are substances that are made up of many units of

• fatty acids.

• glycerol.

• monosaccharides.

• amino acids.

Which type of carbohydrate is found in large quantities in the liver?

• Starch

• Glucose

• Sucrose

• Glycogen

Which of the following is not true about saturated and unsaturated fats?

• Saturated fats contain more cholesterol than unsaturated fats.

• Saturated fats do not have double bonds while unsaturated fats have at least one double bond.

• Saturated fats have less hydrogen atoms compared to unsaturated fats.

• Saturated fats are solids while unsaturated fats are liquids at room temperature.

There are four levels of organisation in protein structure. Which protein is formed when a polypeptide chain is coiled to form an alpha-helix or folded into beta-pleated sheets?

• Primary structure

• Secondary structure

• Tertiary structure

• Quarternary structure

The diagram shows the mechanism of enzyme action.

What does P represent?

• Enzyme

• Substrate

• Enzyme-substrate complex

• Products of the reaction

Organic compounds are chemical compounds that contain the element

• hydrogen.

• carbon.

• oxygen.

• nitrogen.

Lactose is made of

• two fructose molecules.

• two glucose molecules.

• one glucose molecule and one fructose molecule.

• one glucose molecule and one galactose molecule.

A triglyceride molecule is made up of

• amino acids.

• three glucose molecules

• one molecule of glycerol and three molecules of fatty acids.

• three glycerol molecules.

Proteins are made up of the elements

• carbon, hydrogen and oxygen.

• carbon, hydrogen, oxygen and nitrogen.

• carbon, oxygen and nitrogen.

• nitrogen and hydrogen.