Enzymes (Enzymes)

Do enzymes speed up or slow down the rate at which a chemical reaction occurs?

• slow down

• speed up

What is the reactant of this reaction?

• H20

• O2

• H2O2

What are the products of this reaction?

• H2O2 and H2O

• H2O and O2

• O2 only

Enzymes are protein molecules with a very specific shape that help them carry out chemical reactions. What name is given to the specifically shaped region of the enzyme onto which it attaches to a substrate?

• Allosteric

• Cofactors

• Substrate

• Active Site

What specific term is used to describe the "turning on" of an enzyme ?

• competitive

• inhibition

• substrate

• activation

Which of the following is true

• Since the active site has a specific shape it can only fit one substrate

• The active site can fit any type of substrate

• Nothing can fit or bond with the active site of an enzyme

Catalase

• Builds new bonds within H2O2

• Breaks the bonds within H2O2

Look at the diagram. The substances that are released after an enzyme reaction takes place are known as:

• Enzyme-substrate complex

• Products

• Active site

• Reactants

enzymes... 

• slow down chemical reactions

• have no effect on chemical reactions

• speed up chemical reactions