Enzymes - Temperature & pH

Multiple Choice

Enzymes are ___.

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

Multiple Choice

Why are enzymes considered essential for life processes?

• Because they are a source of energy

• Because they speed up chemical reactions

• Because they are a type of carbohydrate

• Because they provide structural support

Multiple Choice

What is activation energy?

• the energy given off during a reaction

• the energy required for a reaction to occur

• changing the shape of the enzyme

• the place where the enzyme matches with the substrate

Multiple Choice

Once enzymes are used, they are destroyed.

• True

• False

Open Ended

Explain how enzymes contribute to digestion in the human body.

Fill in the Blank

On a graph showing enzyme activity versus pH, the ___ represents the optimal pH for enzyme activity.

Multiple Select

Which of the following statements about enzyme activity and temperature are correct? (select 2 correct answers)

• Enzymes work best at an optimum temperature.

• Enzyme activity increases indefinitely with temperature.

• High temperatures can denature enzymes.

• Enzymes are not affected by temperature changes.

Multiple Choice

Which Enzyme works best at a temperature of 37?

• Enzyme A

• Enzyme B

Fill in the Blank

On a graph showing enzyme activity versus temperature, the ___ represents the optimal temperature for enzyme activity.

Multiple Select

Which of the following statements about enzyme activity and pH are correct? (select 2 correct answers)

• Enzymes work best at an optimum pH.

• Enzyme activity increases indefinitely with temperature.

• A pH that is too low (acidic) or too high (basic) can denature enzymes.

• Enzymes are not affected by temperature changes.

Hotspot

Which enzyme's OPTIMAL pH is approximately 9?