EL1.3 Summative Test - Enzymes

Last updated over 3 years ago

12 questions

EL1.3 Summative Test - Enzymes

Last updated over 3 years ago

12 questions

Question 1

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

CO2, H2O, and H2CO3

CO2 and H2O

H2CO3

Question 2

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

activation energy

chemical energy

Question 3

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.

Question 4

What is the optimal temperature for enzyme X?

80°C

52°C

40°C

Question 5

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

X

Y

X and Y are the same 

Question 6

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

Question 7

What does letter B represent?

activation energy

products

reactants

Question 8

Which letter represents a reaction with an enzyme present?

B

A

C

Question 9

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.

Question 10

10.

At which temperatures would Enzyme C be denatured?

40°C

25°C

20°C

Question 11

11.

Which 2 enzymes can function in a neutral pH?

Enzyme B and Enzyme C

Enzyme A and Enzyme B

Enzyme C and Enzyme D

Question 12

12.

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

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