A measure of how acidic or alkaline a solution is.

The point at which the chemical reaction has finished.

The part of an enzyme where the substrate binds.

A permanent change in the shape of an enzyme which stops it from working.

The effect of pH on the rate of an enzyme reaction: data analysis

Combined science

Biological molecules

Tests for biological molecules

Obtaining the elements needed to make biological molecules

Enzymes: function, structure and specificity

Effects of substrate concentration and temperature on rate of enzyme activity

The effect of pH on the rate of an enzyme reaction: plan

The effect of pH on the rate of an enzyme reaction: practical

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.

This unit explores the roles of sugars, amino acids, and fatty acids in the synthesis and breakdown of biological molecules. It covers enzyme action, transport in organisms, hypothesis development, and data interpretation. Emphasis is on planning experiments and presenting explanations.

Biological molecules and enzymes

How much substrate is converted into product.

Which statement defines the term ‘rate of reaction’?

On which axis would you plot the rate of a reaction, when it is plotted against pH?

In the graph below which letter shows when an enzyme is at its optimum temperature?

When enzyme reaction rate is at its highest all the {{}} sites are full.

What word describes an enzyme whose active site has changed shape due to being placed in unfavourable conditions?

What is iodine used to test for the presence of?

Which piece of equipment would you use in this practical to heat the test tubes of starch and amylase to a specific temperature?

Taking a sample at 10 100 and 1000 seconds.

Which of these are examples of continuous sampling?

What does amylase break starch down into?

Which numbered dimple(s) shows that all the starch has been digested?

Starter Quiz

What is iodine used to test for the presence of?