Cambridge Igcse Biology Unit 5 " Enzymes " Key Terms (Definition) & Questions

What is the optimum temperature for the enzyme in figure 5.4

40°C or 104°F

Metabolic Reaction

A chemical process that takes place inside a living organisms

Which kind of reactions inside a living organisms are controlled by enzymes

All organisms

What are the catalysts inside a living organism

An Enzyme

Catalase

An enzyme found in almost all living tissues, which catalyses the breakdown of hydrogen peroxide to water and oxygen

what is meant by carbohydrase

An enzyme that acts on carbohydrates

Maltase

An enzyme that breaks down maltose into glucose

What is the name of this chapter

Enzymes

Give one example of a carbohydrase

Maltase

Active Site

The part of an enzyme molecule into which it substance fits

Sucrose

a disaccharide not reducing sugar, made of glucose molecule and fructose molecule linked together; the form which carbohydrates are transported in the phloem of plants

what is catalysts

a substance that speeds up a chemical reaction without itself being changed

Denatured

an enzyme is said to be denatured when it's a molecule has changed shape so much that the substrate can no longer fit into it

Carbohydrases

an enzyme that catalyses the breakdown of carbohydrates

Protease

an enzyme that catalyses the breakdown of protein

Lipases

an enzyme that digests fats to fatty acids and glycerol

Amylase

an enzyme which breaks down starch to maltose

Name the substrates and product of a reaction involving a carbohydrase

maltase, the substrates is maltose and the product is glucose

Enzymes

proteins that function as biological catalysts

Catalysts

substance that speeds up a chemical reaction and is not changed by the reaction

Enzyme Substrate Complex

the starch fits into the active site of an enzyme

Substrate

the substance an which an enzyme acts

Product

the substance found in an enzyme-controlled reaction

Optimum Temperature

the temperature at which something happens most rapidly

What is meant by an optimum temperature

the temperature which an enzyme works fastest