Enzymes - Assessment

1.

Multiple Choice

1 min

5 pts

What is a substance called if it speeds up a chemical reaction?

reusable

catalyst

specific

fragile

2.

Multiple Choice

45 sec

5 pts

With what 3 letters do enzymes typically end?

-ose

-ase

-ese

-tic

3.

Multiple Choice

1 min

5 pts

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

4.

Multiple Choice

1 min

5 pts

Each enzyme only has 1 substrate that will fit its active site. What is this called?

reusable

catalyst

specific

fragile

5.

Multiple Choice

1 min

5 pts

In the diagram, what is letter A?

product

substrate

enzyme-substrate complex

active site

6.

Multiple Choice

1 min

5 pts

Letter D...

active site

enzyme

substrate

products

7.

Multiple Choice

1 min

5 pts

Letter B...

active site

enzyme

substrate

products

8.

Multiple Choice

1 min

5 pts

Letter C...

active site

enzymes

substrate

products

9.

Multiple Choice

1 min

1 pt

Letter E...

active site

enzyme

substrate

products

10.

Multiple Choice

45 sec

5 pts

An enzyme speeds up a reaction by

lowering the activation energy.

raising the activation energy.

releasing energy.

absorbing energy.

11.

Multiple Choice

1 min

5 pts

What happens when enzymes are heated to a high temperature?

The enzymes die.

The shape of the enzyme are changed and it denatures

The enzymes' amino acid sequence changes.

The enzymes remain the same

12.

Multiple Choice

10 sec

5 pts

The molecule an enzyme is working on is called the:

Substrate

Solvent

Allosteric Inhibitor

CoEnzyme

13.

Multiple Choice

45 sec

5 pts

Which of these is NOT true?

Enzymes can denature (change shape) when the temperature gets too high.

Enzymes can only be used once in a chemical reaction.

Extreme pH can denature enzymes.

Enzymes speed up chemical reactions.

14.

Multiple Choice

45 sec

5 pts

Based on the graph, what temperature does this enzyme work best?

15 C

40 C

30 C

47 C

15.

Multiple Choice

2 mins

1 pt

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

Enzymes increase the energy of the reactants.

Enzymes decrease the energy level of the products.

Enzyme decrease the activation energy of the reaction.

Enzymes reverse the direction of the reaction.

16.

Multiple Choice

2 mins

5 pts

What is the function of an enzyme?

enzymes break themselves into small pieces

enzymes slow down chemical reactions

enzymes speed up chemical reactions

enzymes combine products to form reactants

17.

Multiple Choice

30 sec

5 pts

Enzymes will make a reaction go _______ and use ______ energy.

faster, less

faster, more

slower, less

slower, more

18.

Multiple Choice

30 sec

5 pts

What happens to an enzyme when it is denatured?

Activation energy is lowered.

It becomes stronger.

It loses its shape.

Activation energy is raised.

19.

Multiple Choice

20 sec

5 pts

Every enzyme has a optimal temperature and pH. True or False?

True

False

20.

Multiple Choice

45 sec

5 pts

Enzymes are composed of which of the following monomers?

amino acids

carbohydrates

nucleotides

monosaccharides

Explore this activity with a free account