Free Printable ENZYMES JEDI TRAINING

Worksheets

ENZYMES JEDI TRAINING

Total questions: 15

Worksheet time: 6mins

Name

Class

Date

What is a catalyst?

Process that changes one set of chemicals into another

Element or compound that enters into a chemical reaction

Element or compound produced by a chemical reaction

Substance that speeds up the rate of the chemical reaction

Which of the following decreases the activation energy necessary to initiate the chemical change within the body?

nucleotides

enzymes

amino acids

fatty acids

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements?

Enzymes function best at a specific temperature.

The body needs to be warm to prevent hypothermia.

The body is kept relatively warm to prevent too much enzyme action.

There is no connection between the two statements.

What is it called when a protein loses its shape?

Denaturation

Unfolding

Coiling

Inactivation

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.

Enzymes can denature when the pH changes.

Enzymes speed up chemical reactions.

Which of these do NOT affect enzyme activity?

Temperature

Competitive Inhibitors

Carbohydrates

Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?

they die

they denature

they change their amino acid sequence

they work better

How do enzymes work?

Slow down chemical reactions

Prevent chemical reactions from working

increase the activation energy

speed up the chemical reaction

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.

10.

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

15 C

40 C

30 C

11.

Which line represents an enzyme-catalyzed reaction?

Line 1

Line 2

12.

As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloride acid (HCl), and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?

It becomes inactive.

It begins to replicate.

It's shape changes to engulf large proteins.

It's activity increases to digest more proteins.

13.

In living cells, enzymes act as catalysts, which may reduce the amount of activation energy required for a chemical reaction to occur. In the graphs below, pathway x is a solid line representing the uncatalyzed reaction. The dotted line shows the catalyzed reaction. Which graph best illustrates the changes in a reaction when the catalyst reduces the amount of energy required?