Enzyme Notes

Open Ended

Describe a situation where you felt energetic while playing sports. What do you think was happening inside your body to give you that energy?

Open Ended

Does pizza go directly into our cells? What needs to happen to it before it can be used by our cells?

Multiple Choice

Which of the following best describes the role of enzymes in chemical reactions within a cell?

• They slow down chemical reactions

• They are organic catalysts required for all chemical reactions

• They are inorganic molecules that store energy

• They break down only carbohydrates

Multiple Select

Which of the following are characteristics of enzymes?

• Enzymes are proteins

• Enzymes are inorganic

• Enzymes can be used again and again

• Enzymes can synthesize or break down molecules

Multiple Choice

In the lock and key model, what is the term for the molecule that fits into the enzyme's active site?

• Product

• Substrate

• Reactant

• Catalyst

Open Ended

Explain the lock and key model of enzyme action and why enzyme shape is important for its function.

Multiple Choice

Which of the following best describes the mechanism of enzyme activity as shown in the diagram?

• The enzyme is permanently changed after the reaction.

• The substrate binds to the enzyme to form an enzyme-substrate complex, which then releases products.

• The enzyme breaks down into products.

• The substrate is destroyed before binding to the enzyme.

Fill in the Blanks

Fill in the blank: Enzymes are named by taking the name of the molecule they act on and replacing the ending with

Open Ended

Describe what happens to enzyme activity at temperatures above the optimum temperature.

Multiple Select

Which of the following factors influence the rate of enzyme action?

• Temperature

• Pressure

• Light

• pH

Open Ended

How do you change something's pH?

Multiple Choice

What happens to an enzyme when its pH is changed from its optimum value?

• It becomes more active

• It changes shape and may stop working

• It breaks down into amino acids

• It forms a new enzyme

Fill in the Blanks

Adding more enzyme or substrate will cause the rate of enzyme activity to go up, then

off.

Multiple Select

Which of the following factors can cause enzyme denaturation?

• High temperature

• Extreme pH

• Low substrate concentration

• Both high temperature and extreme pH

Multiple Choice

Which of the following is a reason why controlled enzyme activity is important in cells?

• It helps maintain homeostasis.

• It increases the amount of substrate.

• It prevents the formation of enzymes.

• It causes illness or death.

Fill in the Blanks

The region of an enzyme where the substrate binds is called the

.

Multiple Select

Which of the following terms are directly related to enzyme function?

• Catalyst

• Activation Energy

• Denature

• Substrate

Open Ended

What questions do you still have about enzymes or how they help us get energy to play sports?