Free Printable Enzymes and how they are affected by temperature and pH

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Enzymes and how they are affected by temperature and pH

Total questions: 15

Worksheet time: 14mins

Name

Class

Date

What is the purpose of an enzyme?

give permission for the reaction

raise activation energy

speed up reactions

control how many reactions occur

What is the name for the mechanism of enzyme activity?

Lock and key

jigsaw puzzle

hammer and nail

two hands pattern

can a change in pH alter the active site of an enzyme

yes

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.

What happens when enzymes are heated to a high temperature?

The enzymes die.

The shapes of the enzyme are altered or denatured

The enzymes' amino acid sequence changes.

The enzymes remain the same

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

15 C

40 C

30 C

47 C

What are the enzymes called when they are at low temperature?

denatured

Killed

inactive

normal

Enzymes have a optimum ph

true

false

What ph do enzymes work best at?

1-3

4-5

6-8

9-14

10.

What temperature do human enzymes work best?

39 degrees Celsius

12 degrees Celsius

20 degrees Celsius

37 degrees Celsius

11.

Enzymes are called____

catalysts

products

substrates

reactants

12.

Compare the two pathways, which pathway shows the reaction that has taken place with the help of an enzyme?

Pathway 1

Pathway 2

You cannot tell from these graphs.

Both reactions involved an enzyme.

13.

Looking at the graph, how would you know which reaction took place with the help of an enzyme?

The peak for the activation energy is lower.

The peak for the activation energy is higher.

There is less energy in the products than the reactants.

There is no way to really tell which line on the graph shows a reaction that takes place with a reaction.

14.

Which of the following conclusions can be drawn from this graph?

The optimum pH of the enzyme is 6.6.

The optimum pH of the enzyme is 5.8

The enzyme’s activity increases as pH increases 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

15.

The enzyme Amylase breaks down _______________________

vitamins

proteins

lipids

starches

water

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Enzymes and how they are affected by temperature and pH

Total questions: 15

Worksheet time: 14mins

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