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WorksheetsEnzymes Pre-Quiz
Total questions: 20
Worksheet time: 1hrs 27mins
Name
Class
Date
1.
Which graph shows the typical performance of an enzyme?
a)
top left
b)
top right
c)
bottom right
d)
bottom left
2.
What do humans need to digest the lactose in milk?
a)
substrate
b)
enzyme
c)
acid
d)
product
3.
What is structure E, F, and G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
4.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?
a)
reducing the number of products
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants
5.
What is structure D?
a)
substrate
b)
active site
c)
enzyme
d)
products
6.
Letter D is....
a)
active site
b)
enzyme
c)
substrate
d)
products
7.
Letter C is ....
a)
active site
b)
enzymes
c)
substrate
d)
products
8.
Which of the following is NOT true about enzymes?
a)
enzymes speed up chemical reactions
b)
enzymes react best at a specific temperature
c)
enzymes only control ONE type of reaction
d)
enzymes are made of polysaccharides
9.
What can influence enzyme productivity?
a)
pH
b)
temperature
c)
both pH and temperature
d)
nothing influences enzyme productivity
10.
What makes an enzyme substrate specific?
a)
size
b)
shape
c)
name
d)
location it is found in
11.
What is broken down by the enzyme amylase, which is found in saliva?
a)
sugar
b)
starch
c)
oils
d)
protein
12.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
13.
Enzymes speed up reaction rates by changing...
a)
activation energy
b)
pH
c)
hydrogen Bonds
d)
kinetic energy
14.
Enzymes catalyze reactions by ___________ activation energy.
a)
increasing
b)
decreasing
c)
introducing
d)
removing
15.
At high temperatures enzyme activity declines because of....
a)
denaturation
b)
decreased kinetic motion
c)
increased hydrogen-bonding
d)
dissociation of ionic compounds
16.
Venus flytraps produce chemicals that break down insects into usable compounds. These chemicals are most likely.....
a)
hormones
b)
lipids
c)
enzymes
d)
carbohydrates
17.
'Enzyme Z' breaks up a substrate during a reaction. What happens to 'Enzyme Z' at the end of the reaction?
a)
the enzyme would become products: O2 and H2O
b)
the enzyme would be fully used up and discarded
c)
the enzyme would remain unchanged in any way
d)
the enzyme would become a new type of enzyme
18.
By what chemical process are enzymes synthesized?
a)
polymerization of carbohydrates
b)
condensation reaction between fatty acids and glycerol
c)
peptide bonding of amino acids
d)
hydrolysis of polysaccharides
19.
What is the optimum pH of pepsin which is found in the stomach gastric juice of humans?
a)
pH 5 (slightly acidic)
b)
pH 2 (very acidic)
c)
pH 7 (neutral)
d)
pH 9 (slightly basic/alkaline)
20.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high
b)
Enzymes can only be used once in a chemical reaction
c)
Enzymes can denature when the pH changes
d)
Enzymes speed up chemical reactions
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