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(solution) 1. Yeast have mitochondria and can perform cellular respiration.


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

 

intermembrane space.

 

c. Each of the three processes produce NADH, which carries potential energy to the

 

ETC.

 

d. Each of the three processes produce FADH2, which carries potential energy to the

 

ETC.

 

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

 

electrons.

 

b. Complex I is oxidized because it loses electrons and Q is reduced because it gains

 

electrons.

 

c. Complex I is reduced because it gains electrons and Q is oxidized because it loses

 

electrons.

 

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?

 

a. ATP

 

b. Protons pumped into the intermembrane space

 

c. NADH

 

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

 

molecule

 

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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