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metabolisme and Enzyme

Total questions: 27

Worksheet time: 19mins

Name
Class
Date
1.

What happens to an enzyme when it denatures?

a)

The activation energy of the reaction is doubled.

b)

The activation energy of the reaction is lowered.

c)

It's optimal conditions for temperature of the enzyme are doubled.

d)

The shape of the enzyme molecule is changed.

2.

Most enzymes are composed of .....

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

3.

Enzymes in your body probably work best at which of the following temperatures>

a)

25oC

b)

98oC

c)

37oC

d)

210oC

4.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
5.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
6.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
7.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
8.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
9.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
10.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
11.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
12.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
13.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
14.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
15.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
16.

Which 2 factors can affect the rate of enzyme activity?

a)

Light intensity

b)

Temperature

c)

pH

d)

Oxygen concentration

17.

Reactions that build up molecules

a)

catabolic reaction

b)

anabolic reaction

c)

thermal expansion

d)

reactants and products

18.

A substance that speeds up reactions without changing the produced substances

a)

product

b)

reactant

c)

heat

d)

catalyst

19.

Biological catalysts speed up reactions are unchanged by the reaction

a)

firestarters

b)

products

c)

enzymes

d)

fuel

20.

Molecule produced by enzymes

a)

catalyst

b)

product

c)

reactant

d)

enzyme

21.

Activation energy

a)

increases the amount of product

b)

increased using a catalyst

c)

lowered using a catalyst

d)

lowers the amount of product

22.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
23.
An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 
a)
true
b)
false
24.

What is immobilized enzyme

a)

the enzyme is not moving

b)

the enzyme combine with inert substances to increase resistance to pH and temperature

c)

the enzyme cannot resist high temperature

25.

Name the enzyme used in juice extraction industry?

a)

cellulase and lipase

b)

Lipase and Protease

c)

Cellulase and Pectinase

d)

Pectinase and Amylase

26.

What enzymes that are present in Bio-detergent?

a)

Lactase

b)

Amylase

c)

Lipase

d)

Cellulase

e)

Protease

27.

Some People with cannot drink ordinary milk. What enzyme are used in industry that make the milk is safe for them?

a)

Lactose enzyme

b)

Maltose enzyme

c)

Fructose enzyme

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