A polymer is a molecule made of many repeated units.

Sugars are the units used to build large carbohydrate molecules.

Amino acids are the units used to build protein molecules.

A fatty acid is one of two units used to build lipid molecules.

Glycerol is one of two units used to build lipid molecules.

Biological molecules

Combined science

Tests for biological molecules

Obtaining the elements needed to make biological molecules

Enzymes: function, structure and specificity

Explaining effects of substrate concentration and temperature on enzyme rate

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

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

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

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

What three elements do carbohydrates contain?

Which of the following are polysaccharides?

The order of amino acids is coded for by DNA.

Which statements about proteins are **not** true?

Which of these is a use for lipids in an organism?

Organisms are made of carbohydrates, proteins, lipids, {{}} and minerals.

the units used to build large carbohydrate molecules

the units used to build protein molecules

one of two units used to build lipid molecules

Which of these foods are a good source of carbohydrates?

Match the food group to its use in the body. 

What is the name of the process used by plants to make glucose?

What two fuels are needed for aerobic respiration?

Which biological molecules are made from fatty acids and glycerol?

Starter Quiz

Which of these foods are a good source of carbohydrates?