Ch 5 Enzymes

Ch 5 Enzymes

Quiz Time

Multiple Choice

In the diagram below, part 1 binds to part 2.

Which correctly matches the part and its identity.

• 1: enzyme

• 1. substrate

• 2. substrate

• 3. active site

Open Ended

Define an enzyme.

Quiz Time

Multiple Choice

Lipase digests fats into fatty acids and glycerol. What is/are the substrate(s) in this reaction?

• fatty acids

• glycerol

• lipase

• fats

Multiple Choice

Enzymes are added to biological washing powders to remove stains. Which would be the most effective enzymes in removing chocolate milk stains (containing protein and fat)?

• amylase and maltase

• protease and catalase

• protease and lipase

• amylase and lipase

Quiz Time

Multiple Select

Which statement explains why enzymes are needed in minute amounts (select all answers)

• enzymes remain chemically unchanged at the end of the reaction

• enzymes can be reused

• enzymes speed up chemical reactions

• enzymes are used up

Multiple Choice

What does enzyme specificity mean?

• each chemical reaction is catalysed by one unique enzyme

• one enzyme can catalyse a large number of reactions

• enzymes remain chemically unchanged

• enzymes bind to substrates

Quiz Time

Multiple Select

Which statement(s) is/are correct about the mode of action of enzymes.

• the substrate is the lock and the enzyme is the key

• the substrate is the key and the enzyme is the lock

• the shape of the substrate is the same as that of the active site of the enzyme

• the shape of the substrate is the complementary to that of the active site of the enzyme

Fill in the Blanks

Quiz Time

Multiple Select

Which factor(s) may cause denaturation?

• changes in pH

• changes in acidity

• changes in alkalinity

• changes in temperature

Open Ended

define denaturation.

Quiz Time

Multiple Select

Which statements explain why enzymes are inactive at low temperatures?

• kinetic energy of molecules is low

• kinetic energy of molecules is high

• low rate of collision between enzyme and substrate molecules

• high rate of collision between enzyme and substrate molecules