AP Biology - Enzymes and Cellular
Respiration Review Exam
What is a chemical reaction? CORRECT ANSWERS A chemical reaction is a process
that changes, or transforms one set of chemicals into another by changing bonds
between atoms
Explain the difference between exergonic and endergonic reactions. Gove am example
of each. Which is more likely to occur. CORRECT ANSWERS Exergonic are products
that have less energy than the reactants meaning energy is given off.
Example: Cellular Respiration
Endergonic are products that have more energy than the reactants meaning that energy
is required.
Example: Photosynthesis
Exergonic is more likely to occur because it is easier to break down energy than build it
up
What is activation energy? How do enzymes affect it? CORRECT ANSWERS
Activation energy is the energy needed for a chemical reaction to start. Enzymes affect
it by acting as catalysts. Catalysts are substances that speed up reactions by lowering
the activation energy without altering reaction
Where does Kreb Cycle and ETC occur in the mitochondria? CORRECT ANSWERS
Kreb Cycle: Matrix
ETC: Cristae
What are the products of the Krebs Cycle? CORRECT ANSWERS CO2, ATP, NAD,
FAD
How many ATP are created per NADH & FADH2? CORRECT ANSWERS NADH: 3
FADH2: 2
What is the role of oxygen at the end of cellular respiration? CORRECT ANSWERS
To get hydrogen ions
What is the enzyme-substrate complex? CORRECT ANSWERS Enzyme-substrate
complex is when enzymes provide a site where reactants can be brought together and
react
How does the induced-fit explanation for enzymes alter the old lock & key thought of
enzymes? CORRECT ANSWERS Induced-fit is an enzyme having to change its
Respiration Review Exam
What is a chemical reaction? CORRECT ANSWERS A chemical reaction is a process
that changes, or transforms one set of chemicals into another by changing bonds
between atoms
Explain the difference between exergonic and endergonic reactions. Gove am example
of each. Which is more likely to occur. CORRECT ANSWERS Exergonic are products
that have less energy than the reactants meaning energy is given off.
Example: Cellular Respiration
Endergonic are products that have more energy than the reactants meaning that energy
is required.
Example: Photosynthesis
Exergonic is more likely to occur because it is easier to break down energy than build it
up
What is activation energy? How do enzymes affect it? CORRECT ANSWERS
Activation energy is the energy needed for a chemical reaction to start. Enzymes affect
it by acting as catalysts. Catalysts are substances that speed up reactions by lowering
the activation energy without altering reaction
Where does Kreb Cycle and ETC occur in the mitochondria? CORRECT ANSWERS
Kreb Cycle: Matrix
ETC: Cristae
What are the products of the Krebs Cycle? CORRECT ANSWERS CO2, ATP, NAD,
FAD
How many ATP are created per NADH & FADH2? CORRECT ANSWERS NADH: 3
FADH2: 2
What is the role of oxygen at the end of cellular respiration? CORRECT ANSWERS
To get hydrogen ions
What is the enzyme-substrate complex? CORRECT ANSWERS Enzyme-substrate
complex is when enzymes provide a site where reactants can be brought together and
react
How does the induced-fit explanation for enzymes alter the old lock & key thought of
enzymes? CORRECT ANSWERS Induced-fit is an enzyme having to change its
