EL1.3 Summative Test - Enzymes

Last updated over 3 years ago

12 questions

1

5

Library

EL1.3 Summative Test - Enzymes

Last updated over 3 years ago

12 questions

1

5

Draggable item		Corresponding Item

Identify the reactant(s). CO2+ H2O --> H2CO3.

CO2, H2O, and H2CO3

CO2 and H2O

H2CO3

What is the term used to describe the energy needed to get a reaction started?

activation energy

chemical energy

How do enzymes help chemical reactions take place?

They slow reactions down by increasing the activation energy.

They speed up reactions by lowering the activation energy.

What is the optimal temperature for enzyme X?

80°C

52°C

40°C

At a temperature of 30°C, which enzyme is more active?

X

Y

X and Y are the same 

Which of the following is NOT correct about enzymes?

Enzymes are destroyed after each reaction and therefore must be synthesized again

Enzymes are specific because of their shape and catalyze only certain reactions

What does letter B represent?

activation energy

products

reactants

Which letter represents a reaction with an enzyme present?

B

A

C

Use the table above. If Enzyme C is functioning at 25°C and pH of 7, under which condition would the rate of enzyme action probably increase the most?

The temperature is kept the same and the pH is decreased to 6.

The temperature is increased to 44°C and the pH is kept the same.

The temperature is increased to 30°C and pH is increased to 8.

At which temperatures would Enzyme C be denatured?

40°C

25°C

20°C

Which 2 enzymes can function in a neutral pH?

Enzyme B and Enzyme C

Enzyme A and Enzyme B

Enzyme C and Enzyme D

Using the diagram below, match (click & drag) each description to the correctly labeled number.

Draggable item		Corresponding Item
enzyme-substrate complex		1
substrate		2
products		3
active site		4
enzyme		5

Identify the reactant(s).        CO2+ H2O  -->  H2CO3.

CO2, H2O, and H2CO3

CO2 and H2O

H2CO3

What is the term used to describe the energy needed to get a reaction started?

activation energy

chemical energy

How do enzymes help chemical reactions take place?

They slow reactions down by increasing the activation energy.

They speed up reactions by lowering the activation energy.

What is the optimal temperature for enzyme X?

80°C

52°C

40°C

At a temperature of 30°C, which enzyme is more active?

X

Y

X and Y are the same 

Which of the following is NOT correct about enzymes?

Enzymes are destroyed after each reaction and therefore must be synthesized again

Enzymes are specific because of their shape and catalyze only certain reactions

What does letter B represent? 

activation energy

products

reactants

Which letter represents a reaction with an enzyme present?

B

A

C

Use the table above. If Enzyme C is functioning at 25°C and pH of 7, under which condition would the rate of enzyme action probably increase the most?

The temperature is kept the same and the pH is decreased to 6.

The temperature is increased to 44°C and the pH is kept the same.

The temperature is increased to 30°C and pH is increased to 8.

At which temperatures would Enzyme C be denatured?

40°C

25°C

20°C

Which 2 enzymes can function in a neutral pH?

Enzyme B and Enzyme C

Enzyme A and Enzyme B

Enzyme C and Enzyme D

Using the diagram below, match (click & drag) each description to the correctly labeled number. 

enzyme-substrate complex

1

substrate

2

products

3

active site

4

enzyme 

5