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Enzyme test

Total questions: 13

Worksheet time: 8mins

Name
Class
Date
1.

Which biomolecule are Enzymes part of?

a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
2.

What is the job  of an enzyme?

a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
3.

What happens when enzymes are heated to a very high temperature?

a)
The enzymes die.
b)

The shapes of the enzyme are changed (or denatured)

c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
4.

Which factors can change the shape of an enzyme and therefore make it not work?

a)

too much heat and changes in pH (acid or base levels)

b)
Nothing can
c)
Exposure to light and sound
d)
Exposure to bacteria and Amoebas
5.

Read the following sentence and decide if it's True or False: Every enzyme has a best (preferred or optimal) temperature and pH.

a)
True 
b)
False
6.

Based on the graph, what temperature does this enzyme work best? (be at its highest peak of power)

a)
15 C
b)
40 C
c)
30 C
d)
47 C
7.

What is the best (optimal) pH for enzyme A to be at its peak power?

a)

8

b)

2

c)

5.7-10

d)

10

8.

What part of the enzyme process is letter A in the picture?

a)
Substrate
b)
Enzyme
c)
Product
d)
Complex
9.

What part of the enzyme process is letter B in the picture?

a)
Substrate
b)
Enzyme
c)
Substrate
d)
Product
10.

What letters do most enzyme names end in?

a)

denature

b)

-ase

c)

-ose

11.

The human _____________ system depends on enzymes to work

a)

excretory

b)

digestive

c)

nervous

d)

respiratory

12.

If enzymes in the stomach prefer to be in a pH of 2 and the enzyme is moved to the intestine with a pH of 8 will the stomach enzymes work in the new place?

a)

yes, enzymes work wherever they are

b)

yes, stomach enzymes work in all parts of the digestive system

c)

no, enzymes only work at their preferred pH

d)

no, not at first but after awhile the enzyme will start to work

13.

This shows an enzyme working on a carbohydrate. Choose the answer that explains what happened.

a)

A is the substrate and the enzyme broke it down for to the body to use

b)

B and C are the molecules the body is eating and the enzyme put it together

c)

A, B and C are all different molecules and the enzyme is working on each one separately