IGCSE Topic 3 - Enzymes Intro

What are enzymes?

• Biological catalysts

• Chemical catalysts

• Physical catalysts

• Psychological catalysts

What type of biological molecule are enzymes?

• Carbohydrate

• Lipid

• Protein

• DNA

Every enzyme catalyses a SINGLE reaction because they are ...

• Reusable

• Specific

• Proteins

• Special

Which model explains how enzymes work?

• Lock & key

• Lock & load

• Lock & chain

• Lock & pop

Which term is given to the molecule that binds to an enzyme?

• Substance

• Product

• Substrate

• Stratum

Where on the enzyme does the substrate bind?

• Active Area

• Binding Site

• Binding Area

• Active Site

An enzyme and its substrate bind together because they have ...

• the same shape

• complementary shapes

• opposite shapes

• different shapes

Which enzyme breaks down protein?

• Amylase

• Catalase

• Lipase

• Protease

Which enzyme breaks down starch?

• Amylase

• Catalase

• Lipase

• Protease

Which reaction is catalysed by lipase?

• Lipids => Glycerol

• Lipids => Amino Acids & Glycerol

• Lipids => Fatty Acids

• Lipids => Fatty Acids & Glycerol