Spaced repetition quiz 1 enzymes and biological molecules

Enzymes are classed as being biological catalysts. Why?

• Because they perform biological reactions

• Because they speed up chemical reactions

• They speed up chemical reactions without being used up

• Because they break down large molecules

What is the name of the site on the enzyme that the substrate binds to?

• Allosteric site

• Binding site

• Active site

• Complementary site

When the substrate binds to the enzymes active site an intermediate is formed, what is it called?

• Enzyme reaction

• Enzyme-substrate

• Enzyme-product complex

• Enzyme-substrate complex

As the temperature increases towards the enzymes optimum temperature, the rate of reaction increases, why?

• The enzyme has more energy to perform the reactions

• The enzyme and substrate move around more due to the increase in thermal energy

• More collisions between enzyme and substrate due to more kinetic energy

• The enzyme works better at its optimum pH

The enzyme Amylase speeds up the reaction of .............. to maltose

• Starch

• Glycogen

• Cellulose

• Glucose

When enzymes are exposed to temperatures well above their optimum we say they become

• Damaged

• Denured

• Denatured

• Dead

Made up of carbon, hydrogen, oxygen and other elements including nitrogen

• Starch

• Protein

• Glucose

• Lipids

Made up of only carbon, hydrogen and oxygen

• Lipids

• Protein

• Glucose

• Starch

Name the biological test that involves using a water bath

• Biuret test

• Emulsion test

• Benedicts test

• Reducing protein test

The colour change in the correct order of varying sugar concentrations in the benedicts test

• Orange - blue - black

• Orange - blue - lilac

• Orange - green - yellow - brick red

• Blue - green - yellow - orange - brick red