A protein which acts as a biological catalyst.

A substance that speeds up the rate of a reaction without being used up.

The part of an enzyme where the substrate binds.

The substance which is acted upon by the enzyme.

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

Enzymes: function, structure and specificity

Combined science

Pupils will learn how substances essential for chemical reactions, and the products of the reactions, are transported into, around and out of the human body.

Pupils learned about differences in the cell structures of eukaryotic and prokaryotic organisms.

Biological molecules and enzymes

substance which speeds up the rate of a reaction without being used up

substance which is acted upon by the enzyme

protein which acts as a biological catalyst

part of an enzyme where the substrate binds

The substrate(s) binds to the active site.

Put the following steps in order to describe how an enzyme works.

Andeep: Enzymes increase the activation energy so the reaction happens faster.

Lucas: Enzymes lower the activation energy so the reaction happnes faster.

Who is correctly describing the effect of adding an enzyme on the activation energy of an enzyme controlled reaction?

In the lock and key model of enzyme action, what is the lock?

Proteins are used in the body for {{}} and repair in the body.

a substances that slows down chemical reactions

a substances that stops chemical reactions

a substances that speeds up chemical reactions

Scientists use {{}} as simpler representations of complex things and ideas.


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

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

Starter Quiz