4. enzymes part 2

What does the term optimum mean for enzyme temperature?

• The lowest temperature at which the enzyme works

• The temperature which gives the highest enzyme activity

• The temperature which gives the lowest enzyme activity

• The highest temperature before denaturing occurs

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

•The optimum temperature of enzymes in our bodies is ____.

• 36°C
• 37°C
• 38°C
• 39°C

What happen to enzymes at high temperatures?

• They are denatured

• They work best at this temperature

• They start digesting food faster

• They break down carbohydrates

Other than temperature, what is the other factor that affects enzyme activity?

• pH

• amount of water

• type of food

• time

Based on the graph, what is the optimal temperature for this enzyme? 

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Which enzyme is most efficient in an alkaline solution?

• A

• B

The graph shows the effect of temperature on the time taken for the complete digestion of starch.

• 10oC

• 30oC

• 40oC

• 50oC

The graph shows the effect of pH on the rate of reaction of three different enzymes.

What does the graph show?

• each enzyme works best at a different pH

• each enzyme works best over a small temperature range

• these enzymes work best in acid conditions

• these enzymes work best in alkaline conditions

The apparatus shown is used for an experiment on starch digestion.

Which tube contains the most maltose after 20 minutes?

• Tube A

• Tube B

• Tube C

• Tube D