Enzyme Reaction Quiz

What must you refer to when describing the effect of temperature on enzyme reactions?

• The y-axis

• The x-axis

• The graph title

• The legend

Why does the rate of reaction initially increase with temperature?

• Enzymes become inactive

• Substrates are depleted

• More enzyme-substrate collisions occur

• The pH changes

What happens to enzymes at high temperatures?

• They denature

• They dissolve

• They change color

• They become more active

How does pH affect enzyme activity?

• It has no effect

• It increases substrate concentration

• It alters the enzyme's shape

• It changes the enzyme's color

What happens to enzyme activity as you move away from the optimum pH?

• It becomes unpredictable

• It decreases

• It remains constant

• It increases

What occurs when substrate concentration increases in an enzyme reaction?

• The rate decreases

• The substrate changes

• The rate levels off

• The enzyme denatures

Why does the reaction rate level off at high substrate concentrations?

• The temperature decreases

• Enzymes are destroyed

• Substrates are depleted

• All active sites are occupied

How does a competitive inhibitor affect enzyme activity?

• It changes the enzyme's shape

• It has no effect

• It decreases the rate

• It increases the rate

What is the effect of adding more substrate in the presence of a competitive inhibitor?

• The enzyme denatures

• The rate remains the same

• The rate decreases

• The rate eventually reaches the maximum

How does a non-competitive inhibitor affect the enzyme's active site?

• It removes the active site

• It changes the active site's shape

• It has no effect on the active site

• It increases the active site's size