Question 1

The following reactions all occur in mitochondria during aerobic respiration:

1 - decarboxylation of pyruvate

2 - reduction of NAD

3 - substrate level phosphorylation of ATP

Which reaction(s) take place outside the mitochondria in yeast cells?

  A  

1, 2, and 3

  B  

only 1 and 2

  C  

only 2 and 3

  D  

only 1

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Question 2

What is the net gain in ATP molecules following the glycolysis of one glucose molecule?

  A  

1

  B  

2

  C  

4

  D  

6

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Question 3

What is the number of molecules of triose phosphate required to produce two molecules of glucose?

  A  

1

  B  

2

  C  

4

  D  

8

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Question 4

Which statement(s) is/are true of anaerobic respiration in both animal and yeast cells?

1 - pyruvate is produced in glycolysis

2 - reduced NAD is oxidised

3 - two molecules of ATP are produced net, per glucose molecule

  A  

1, 2, and 3 are correct

  B  

only 1 and 2 are correct

  C  

only 2 and 3 are correct

  D  

only 1 is correct

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Question 5

Cellular respiration occurs in different regions of a cell.

In which region is FADH2 produced?

  A  

cytoplasm

  B  

outer mitochondrial membrane

  C  

inner mitochondrial membrane

  D  

mitochondrial matrix

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Question 6

The balanced equation for the aerobic respiration of a substrate is given below:

                      2 C18H34O2 + 51 O2 → 36 CO2 + 34 H2O

Which statement gives the correct respiratory quotient (RQ) and identity of this substrate? 

  A  

RQ = 0.68, and the substrate is a carbohydrate

  B  

RQ = 0.71, and the substrate is a fatty acid

  C  

RQ = 0.76, and the substrate is a carbohydrate

  D  

RQ = 1.00, and the substrate is a fatty acid

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Question 7

Which option correctly identifies the products of anaerobic respiration in yeast?

  A  

CO2, NAD, ATP, and ethanol

  B  

CO2, NAD, ADP, and lactic acid

  C  

CO2, reduced NAD, ATP, and ethanol

  D  

CO2, reduced NAD, ADP, and lactic acid

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Question 8

Oxidative phosphorylation is the process in which the transfer of electrons from reduced NAD or reduced FAD to oxygen results in the production of ATP.

What is the number of ATP molecules gained from the oxidation of two molecules of reduced NAD?

  A  

2

  B  

3

  C  

4

  D  

5

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Question 9

Proton pumps establish electrochemical gradients, which are required for ATP production.

Which regions of a plant cell are protons pumped into?

  A  

chloroplast stroma and mitochondrial intermembrane space

  B  

chloroplast stroma and mitochondrial matrix

  C  

thylakoid space and mitochondrial intermembrane space


  D  

thylakoid space and mitochondrial matrix

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Question 10

What is a similarity in the way ATP is made in respiration and photosynthesis?

  A  

both involve NAD

  B  

both involve substrate level phosphorylation

  C  

both involve photons

  D  

both involve proton gradients

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Question 11

Which statement describes and explains the relative yield of ATP in anaerobic and aerobic respiration?

  A  

anaerobic respiration produces less ATP per molecule of glucose because lactate is converted to pyruvate

  B  

anaerobic respiration produces less ATP per molecule of glucose because NAD is not regenerated in oxidative phosphorylation

  C  

anaerobic respiration produces more ATP per molecule of glucose because NAD is regenerated in oxidative phosphorylation

  D  

anaerobic respiration produces more ATP per molecule of glucose because pyruvate is converted to lactate

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