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WorksheetsEnzymes and ATP Review
Total questions: 40
Worksheet time: 21mins
Enzymes are an example of
lipids
proteins
carbohydrates
nucleic acids
What is the function of an enzyme?
speed up chemical reactions
slow down chemical reactions
raise the activation energy
reduce number of chemical reactions in the cell
How do enzymes manage to increase the rate of chemical reactions?
reduce the number of products
increase the temperature in the cell
decrease the activation energy
increase concentration of reactants
What 3 letters do enzyme names typically end in?
-ose
-ese
-ase
-tic
The substance an enzyme acts upon is called
substrate
nucleus
ribosome
coenzyme
After the enzyme binds to the substrate and performs the chemical reaction, what happens to the substrate?
substrate is unchanged
becomes product(s)
remains attached to the enzyme
becomes an enzyme also
In the diagram, what is letter A?
substrate(s)
active site
enzyme-substrate complex
product(s)
enzyme
In the diagram, what is letter B?
substrate(s)
active site
enzyme-substrate complex
product(s)
enzyme
In the diagram, what is letter C?
substrate(s)
active site
enzyme-substrate complex
product(s)
enzyme
In the diagram, what is letter D?
substrate(s)
active site
enzyme-substrate complex
product(s)
enzyme
In the diagram, what is letter E?
substrate(s)
active site
enzyme-substrate complex
product(s)
enzyme
Enzymes provide a site where reactants can be brought together in an enzyme-catalyzed reaction. What is this site?
reaction site
active site
inactive site
allosteric site
Based on the graph, what is the optimal temperature for this enzyme?
0°C
25°C
30°C
47°C
An enzyme speeds up a chemical reaction, but it can only be used once.
true
false
What happens when an enzyme is heated to a high temperature?
nothing happens
the enzyme becomes more efficient
the enzyme's amino acid sequence changes
the enzyme is denatured
Which of these factors can affect the rate of enzyme activity?
substrate concentration
temperature
pH
presence of inhibitor molecules
light intensity
Which of these factors can denature an enzyme?
substrate concentration
temperature
pH
presence of inhibitor molecules
light intensity
What does it mean for an enzyme to be denatured?
temporarily inactive
permanent shape change
it will not function normally
it works more efficiently
Which letter corresponds to the reaction pathway without an enzyme?
A
B
C
D
Which letter corresponds to the reaction pathway WITH an enzyme?
A
B
C
D
Which letter corresponds to the activation energy without an enzyme?
A
B
C
D
Which letter corresponds to the activation energy WITH an enzyme?
A
B
C
D
What is activation energy?
energy needed to begin a reaction
energy needed to end a reaction
The graph shows how enzymes affect chemical reactions in cells. Which best summarizes the information shown in the graph?
enzymes increase the energy of the reactants
enzymes decrease the activation energy of the reaction
enzymes decrease the energy level of the products
enzymes reverse the direction of the reaction
The scientific model of enzyme action is referred to as
lock and key model
reduced fit model
Davson-Danielli model
substrate product model
The reaction pictured shows what type of reaction?
catabolic
anabolic
dehydration synthesis
denaturation
When a molecule can occupy the same active site as the substrate, a situation called __ can result.
competitive inhibition
allosteric inhibition
increased activity
optimalization
Receptor site on an enzyme where another molecule can bind, changing the shape of the enzyme; temporarily inactivating it...
active site
allosteric site
product site
denaturation site
Molecules that can bind to enzymes and enhance the enzyme's ability to function are called:
cofactors
coenzymes
cosubstrates
inhibitors
Which best describes an exergonic chemical reaction?
does not absorb any energy
is in a state of equilibrium
products have higher energy than reactants
releases more energy than it absorbs
Chemical reactions that absorb more energy than they release are called
exothermic
endothermic
exergonic
endergonic
What does the "TP" in ATP stand for?
toilet paper
two phosphates
tri (three) phosphates
two proteins
How many phosphate groups are in ADP?
1
2
3
4
This is ATP. What type of molecule is this?
modified lipid
modified monosaccharide
modified nucleotide
modified amino acid
What part of the molecule is represented by letter A?
nitrogen base
ribose
deoxyribose
phosphate group
What part of the molecule is represented by letter B?
nitrogen base
ribose
deoxyribose
phosphate group
Between which parts of the molecule must be broken to form an ADP molecule and release energy?
between A & B
between B & C
between C & D
anywhere will do
Energy is released from ATP when...
a phosphate group is added
a phosphate group is removed
ATP is exposed to sunlight
bond between adenine and ribose is broken
Which of the following can be compared to a battery in need of recharging?
ATP
ADP
adenosine
ribose
What part of ATP contains high-energy bonds?
adenosine
adenine
ribose
phosphates
