I have attached 10 multiple choice questions I need answered. Thanks!
1. Yeast have mitochondria and can perform cellular respiration. What would you expect
to be consumed and produced during the process of cellular respiration in yeast?
a. Glucose and O2 consumed; CO2, H2O, and energy produced.
b. Glucose, H2O, CO2, and energy consumed; O2 produced.
c. CO2 and H2O consumed; glucose, O2, and energy produced.
d. CO2 and energy consumed; H2O, O2, and energy produced.
2. Q3.2. In which way do cells use glucose during the production of ATP?
a. Cells incorporate some of the atoms from glucose molecules into ATP molecules.
b. Cells convert glucose molecules entirely into energy, which is then stored in ATP.
c. Cells transfer some of the energy stored in glucose's chemical bonds to ATP.
d. Cells directly combine glucose with O2 in the ETC to produce energy for ATP.
3. Recall that in cellular respiration, the processes of glycolysis, pyruvate processing, and
the citric acid cycle precede the electron transport chain. What is produced by these
three prior processes that is used by the electron transport chain? (Hint: Click here to
see an overview of the major processes in cellular respiration.)
a. Each of the three processes produce ATP, which carries potential energy to the ETC.
b. Each of the three processes produce protons that the ETC pumps into the
c. Each of the three processes produce NADH, which carries potential energy to the
d. Each of the three processes produce FADH2, which carries potential energy to the
4. Complex I transfers electrons to Q (coenzyme Q) in one of the reactions in the electron
transport chain. Which molecule is reduced and which is oxidized in this reaction?
a. Complex I is reduced because it loses electrons and Q is oxidized because it gains
b. Complex I is oxidized because it loses electrons and Q is reduced because it gains
c. Complex I is reduced because it gains electrons and Q is oxidized because it loses
d. Complex I and Q are both oxidized because electrons are moved from one molecule
to the other.
5. Which of the following does NOT store potential energy that is usable by a cell?
b. Protons pumped into the intermembrane space
d. CO2 6. Some students have the misconception that during cellular respiration, the matter in
glucose is somehow turned into energy. Consider that when we exercise, we burn
glucose and also lose mass. Why does this happen?
a. Our cells use up the potential energy stored in glucose, and losing that energy during
exercise reduces our mass.
b. Our cells convert the mass in glucose into energy, which is weightless.
c. Our cells convert the mass in glucose into energy that is used during exercise. Losing
that energy reduces our mass.
d. Our cells convert glucose into CO2 and water, which are eliminated from our bodies
when we exercise.
7. Which of the following would INCREASE the number of ATP molecules generated per
NADH molecule in the electron transport chain?
a. Reversing the direction of proton pumping by Complex I
b. Reducing the number of protons required by ATP synthase to produce an ATP
c. Having NADH transfer its electrons to Complex III instead of Complex I
d. Reducing the amount of oxygen available to the cell
8. The antibiotic antimycin A causes electrons to become stuck to Q, so that they are
unable to ever reach Complex IV. Which of the following scenarios you explored in this
tutorial is MOST SIMILAR to the effects of antimycin A?
a. Lack of oxygen (electrons don't leave the ETC)
b. Presence of DNP (protons leak through the membrane)
c. Starvation (lack of glucose)
d. Intense exercise (high ATP utilization)
9. For which of the following is potential energy INCREASING? (Hint: Click here to see an
overview of the ETC.)
a. Protons moving from the mitochondrial matrix to the intermembrane space
b. Electrons moving from Complex IV to O2
c. Protons moving from the intermembrane space to the mitochondrial matrix
d. Electrons moving from Complex III to Complex IV
10. What would happen to you, metabolically, if all your mitochondria were destroyed?
a. You would have much less ATP available to think, move muscles, etc.
b. You would have many fewer electrons available to think, move muscles, etc.
c. You would have much less oxygen available to think, move muscles, etc.
d. You would have much less glucose available to think, move muscles, etc.
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