Unit 3 - Enzymes - Biology

Enzymes are an example of

• lipids

• carbohydrates

• protein

• nucleic acid

In the diagram, what is letter A?

• product

• enzyme-substrate complex

• substrate

• active site

Letter D...

• enzyme

• active site

• substrate

• products

Letter B...

• substrate

• active site

• enzyme

• products

Letter C...

• products

• substrate

• enzymes

• active site

Letter E...

• active site

• products

• substrate

• enzyme

An enzyme speeds up a reaction by

• raising the activation energy

• lowering the activation energy

• releasing energy

• absorbing energy.

What happens to an enzyme when it is denatured?

• Activation energy is lowered

• It becomes stronger

• It loses its shape

• Activation energy is raised

A student studying reactions with enzymes uses the graph to form a conclusion. What is the best conclusion a

student can make based on the information on the graph?

• The amount of activation energy is lower in reactions

  without enzymes.

• The amount of activation energy needed is greater in

  reactions with enzymes.

• A reaction with an enzyme lowers the activation energy

  needed.

• As the reaction continues the amount of energy needed

  increases.

Enzymes can be reused over and over again.

• True

• False