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

Fill in the Blank

Name the part of the enzyme that the substrate binds to.

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

Fill in the Blank

Name the enzyme that digests maltose.

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 Blank

What is this known as?

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

Fill in the Blank

As temperature increases, kinetic energy of enzyme and substrate molecules _________.

Fill in the Blank

At _______ temperature, enzymes are the most active.