Unit 3 Exam Review
(164).webp "Unit 3 Exam Review - Quiz")
Answers are after each question. (Try to answer without hitting "explanation")
- 1.
Which is the correct order of events?
- A.
NADH gets oxidized, ATP is made, Protons get pumped
- B.
ATP is made, Protons get pumped, NADH gets oxidized
- C.
NADH gets oxidized, Protons get pumped, ATP is made
- D.
Protons get pumped, ATP is made, NADH gets oxidized
Correct Answer
C. NADH gets oxidized, Protons get pumped, ATP is madeExplanation
Answer C This series describes the events in the electron transport chain from NADH (produced in glycolysis and the Krebs Cycle) to Protons Pumped (using the energy from NADH) to ATP being made using a proton gradient.Rate this question:
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- 2.
The process described in question 1 is
- A.
Electron Transport
- B.
Krebs Cycle
- C.
Glycolysis
- D.
The Prepatory Reaction
Correct Answer
A. Electron TransportExplanation
The correct answer is A Electron transport involves NADH, Electrons carriers and the end result in a proton gradient used to make ATP via ATP synthase.Rate this question:
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- 3.
The process described in question 1 takes place in
- A.
The cytoplasm
- B.
The inner membrane and membrane space
- C.
The matrix
- D.
None of the above
Correct Answer
B. The inner membrane and membrane spaceExplanation
Answer B. The electron Transport Chain and ATP synthase is in the inner membrane and protons are pumped into the space.Rate this question:
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- 4.
Pyruvate +NAD+ +CoA ------>AcetylCoA +NADH +Carbon DioxideIn this reaction, what gets reduced?
- A.
Pyruvate
- B.
NAD+
- C.
Pyruvate and NAD+
- D.
Neither Pyruvate nor NAD+
Correct Answer
B. NAD+Explanation
B NAD+ goes to NADH. This is addition of one electron (Charge goes from +1 to zero). Thus it is a reduction.Rate this question:
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- 5.
Pyruvate +NAD+ +CoA ------>AcetylCoA +NADH +Carbon DioxideThis reaction is
- A.
In Glycolysis
- B.
In Electron Transport
- C.
In the prepatory reaction
- D.
In the Krebs Cycle
Correct Answer
C. In the prepatory reactionExplanation
C Formation of AcetylCoA is needed to bring carbons into the Krebs CycleRate this question:
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- 6.
The Above reaction
- A.
Requires Energy to get from reactant to product
- B.
Gives off energy getting from reactant to product
- C.
Does not obey the first law of thermodynamics
- D.
Has no activation energy
Correct Answer
A. Requires Energy to get from reactant to productExplanation
A. The end products (right) have more energy than the reactants (Left). Thus Free energy change is positive and energy input is required.Rate this question:
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- 7.
The Red line is
- A.
The reaction without an enzyme
- B.
The reaction with an enzyme
- C.
The reaction at very high temperataures
- D.
Feedback inhibtion
Correct Answer
B. The reaction with an enzymeExplanation
B. Activation energy is less with the enzymeRate this question:
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- 8.
The Krebs Cycle
- A.
Makes pyruvate
- B.
Makes a proton gradient
- C.
Uses oxygen directly
- D.
Makes FADH2
Correct Answer
D. Makes FADH2Explanation
D Along with NADH, FADH2 is an important product of the Krebs cycle that is used in the electron transport chain.Rate this question:
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- 9.
The electrons from NADH are transferred to
- A.
ATP
- B.
FAD
- C.
Oxygen
- D.
Carbon Dioxide
Correct Answer
C. OxygenExplanation
C. During Electron Transport, electrons are transferred to oxygen.Rate this question:
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- 10.
This process is most important when oxygen is low
- A.
Glycolysis
- B.
Electron Transport
- C.
Krebs cycle
- D.
Fermentation
Correct Answer
D. FermentationExplanation
D Fermentation allows regeneration of NAD+ so that glycolysis can keep going.Rate this question:
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.png "The Above reaction")
.png "The Red line is")
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Apr 16, 2024Quiz Edited by
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Oct 31, 2013Quiz Created by
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