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WorksheetsAP Biology Ch 8 Metabolism & Enzymes
Total questions: 15
Worksheet time: 30mins
Name
Class
Date
1.
Which of the following correctly describes how enzymes work?
a)
they lower the energy of the reactants to increase the rxn rate
b)
they supply energy to the reaction to increase the rxn rate
c)
they lower the energy of the products to increase the rxn rate
d)
they lower the activation energy of the reaction to increase the rxn rate
2.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
peptide bond
3.
The energy needed to start a reaction
a)
activation energy
b)
adhesion energy
c)
chemical energy
d)
cohesion energy
4.
Blocking Active site of an enzyme
a)
competitive inhibition
b)
allosteric inhibition
5.
Zinc and Iron
a)
Coenzymes
b)
Cofactors
c)
Organic
6.
Vitamin C
a)
Cofactor
b)
Coenzyme
c)
Competitive inhibitor
7.
A --> B + C
a)
Anabolic
b)
Catabolic
8.
A + B --> C
a)
Anabolic
b)
Catabolic
9.
Main cellular energy molecule
a)
ATP
b)
ADP
c)
cAMP
10.
Energy is released from ATP when
a)
a phosphate group is added
b)
adenine bonds to ribose
c)
ATP is exposed to sunlight
d)
a phosphate group is removed
11.
Cyanide is a toxin that stops the mitochondria from producing ATP. If cyanide were introduced into your cells, it is probably acting as a(n)
a)
activator
b)
coenzyme
c)
inhibitor
d)
substrate
12.
Which of the following is part of the first law of thermodynamics?
a)
energy cannot be created or destroyed
b)
entropy of the universe is constant
c)
kinetic energy is stored energy
d)
energy cannot be transferred or transformed
13.
Whenever energy is transformed, there is always an increase in the ______________
a)
free energy and enthalpy of the universe
b)
free energy of the universe
c)
entropy of the universe
d)
enthalpy of the univers
14.
Some bacteria are metabolically active in hot springs because ____________
a)
their enzymes are insensitive to temperature
b)
they use molecules other than proteins as their main catalysts
c)
their enzymes have high optimal temperatures
d)
they are able to maintain an internal temperature much cooler than that of the surrounding water
15.
Metabolism is _______________
a)
a constant supply of energy from food
b)
an increase of entropy in an organism
c)
all the energy transformation reactions in an organism
d)
biochemical pathways involved in synthesis of macromolecules
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