Enzyme Quiz

What is formed when an enzyme and substrate collide successfully?

• A new enzyme

• An enzyme-substrate complex

• A new substrate

• A new product

What is the main factor that determines the rate of an enzyme reaction?

• The color of the enzyme

• The number of enzyme molecules reacting with substrate molecules

• The size of the substrate

• The shape of the container

What is the result of the enzyme being denatured at 80°C?

• The solution becomes clear.

• The enzyme works faster.

• The solution remains cloudy.

• The enzyme changes color.

What affects the rate of reaction of an enzyme?

• Temperature

• pH

• Light

• Pressure

What happens if the pH of a solution is too high for an enzyme?

• The enzyme works faster

• The enzyme changes color

• The enzyme may not work

• The enzyme becomes larger

What is shown on the graph between points B and C?

• Decrease in reaction rate

• Increase in reaction rate

• Plateau in reaction rate

• Fluctuation in reaction rate

What is the effect of enzyme concentration on reaction rate after a certain point?

• It continues to increase

• It decreases

• It levels off

• It fluctuates

What is the relationship between enzyme concentration and reaction rate?

• Directly proportional (straight line sloping upwards)

• Inversely proportional

• No relationship

• Random

What is the effect of a solution's pH on enzyme shape?

• No effect

• Changes the shape of active site

• Makes it larger

• Makes it smaller

What is the main function of an enzyme in a reaction?

• To slow down the reaction.

• To increase the rate of reaction.

• To change the color of the solution.

• To decrease the temperature.