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Enzyme/ATP
Test Description: Concept 1 and 2
Instructions: Answer all questions to get your test result.
1) What phrase best describes an exothermic reaction?
A
releases more energy than it absorbs
B
forms products with higher bond energy than reactants
C
is in a state of equilibrium
D
does not absorb energy
2) Identify the PRODUCTS in this reaction: 6H20 + 6 CO2 = C6H12O6 + 6O2
A
6H20 and 6CO2
B
6CO2 and C6H12O6
C
C6H12O6 and 6O2
D
6H20, C6H12O6, and 6CO2
3) Chemical reactions that ABSORB more energy than they release are called
A
exothermic
B
catalyzed
C
endothermic
D
activated
4) The activation energy needed for a chemical reaction is DECREASED by a
A
substrate
B
catalyst (enzyme)
C
product
D
reactant
5) If the activation energy of a biochemical reaction is lowered, then
A
the reaction will not happen at all
B
this will not affect the rate of the reaction
C
the reaction will happen faster
D
the reaction will happen more slowly
6) The molecule that an enzyme binds to is known as its
A
polymer
B
substrate
C
matching base
D
monomer
7) Reactants bind to enzymes at the
A
active site
B
product
C
activation energy
D
substrate
8) Which macromolecule found in the food you eat will your cells break down FIRST to get ATP?
A
proteins
B
carbohydrates
C
lipids
D
nucleic acids
9) Which phrase BEST describes the function of the ATP molecule?
A
stores energy
B
absorbs energy
C
creates energy
D
increases energy
10) Energy is released from an ATP molecule for cellular processes when it
A
converts a phosphate group to ADP
B
loses a phospate group
C
produces a sugar molecule
D
attaches an extra phosphate group
11) Which of the following reactions DIRECTLY provides chemical energy for most cell functions?
A
ATP = ADP + P
B
ADP + P = ATP
C
ATP + P = ADP
D
ADP = ATP + P
12) Where does your body get the energy for reattaching a third phosphate to ADP, creating ADP?
A
from breaking ATP
B
usually from carbs
C
from nucleic acids
D
from the sun
13) Increasing the temperature of the reaction will do what?
A
cook all of the reactants
B
increase the rate of the reaction
C
stop the reaction
D
lower the rate of the reaction
14) How does substrate concentration change the rate of a chemical reaction?
A
There is no change
B
The higher the substrate, the slower the rate of reaction
C
The lower the substrate the faster the rate of reaction
D
The higher the substrate the faster the rate of reaction
15) What is a catalyst?
A
it is like an inhibitor and stops reactions
B
like an enzyme and it lowers the activation energy
C
increases the activation energy
D
it does nothing
16) What does a competitive inhibitor do?
A
It does not affect a reaction at all.
B
It speeds up the rate of the reaction
C
It competes with the substrate for the active site and slows down the reaction
D
It helps the reactants to react faster
17) What is denaturation?
A
when the rate of a reaction will happen faster
B
when enzymes work at a faster rate
C
when an enzyme is given special powers to work better
D
when an enzyme's active site gets deformed and loses is specific shape
*select an answer for all questions
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