Enzymes: function, structure and specificity | Starter Quiz | Oak National Academy

What are the monomers of proteins?

• lipids

• fatty acids and glycerol

• amino acids

• glucose

• starch

Answer explanation

Proteins are polymers made up from amino acids.

Proteins are used in the body for ___ and repair in the body.

Answer explanation

Proteins are used in the body for growth and repair.

What is a catalyst?

• a substances that slows down chemical reactions

• a substances that stops chemical reactions

• a substances that speeds up chemical reactions

Answer explanation

Catalysts speed up chemical reactions, which can be inside the body or industrial processes.

Scientists use ___ as simpler representations of complex things and ideas.

Answer explanation

Models are used to represent complex things and ideas, many of which we cannot see.

Where do consumers in food webs get the nitrogen they need to make proteins?

• air

• water

• soil

• food

Answer explanation

Consumers get all their nitrogen from eating other organisms, they cannot obtain nitrogen from the air even though 78% of the air is nitrogen.

True or false? Photosynthesis and respiration involve a series of chemical reactions.

• True

• False

Answer explanation

Respiration and photosynthesis involve many chemical reactions.