Microbiology

ENERGY RELEASE AND CONSERVATION MCQs

Total Questions : 27

Page 1 of 3 pages
Question 1. Organisms can synthesize ATP by oxidative phosphorylation when they
  1.    oxidize glucose to pyruvate
  2.    pass electrons to oxygen through an electron transport system containing cytochromes
  3.    ferment
  4.    pass electrons from the oxidation of chlorophyll through an electron transport system
 Discuss Question
Answer is Option B. -> pass electrons to oxygen through an electron transport system containing cytochromes
Question 2. In glycolysis, ATP is created by
  1.    the chemiosmotic mechanism
  2.    substrate level phosphorylation
  3.    photophosphorylation
  4.    the pentose phosphate pathway
 Discuss Question
Answer is Option B. -> substrate level phosphorylation
Question 3. How many molecules of carbon dioxide will be given off during ten turns of the Krebs cycle?
  1.    40
  2.    20
  3.    30
  4.    10
 Discuss Question
Answer is Option B. -> 20
Question 4. Suppose a eukaryotic cell had a mutation that prevented the production of cytochrome c. As a result of this mutation, which of the following processes would not occur?
  1.    Cell wall synthesis
  2.    Mitosis
  3.    Cellular respiration
  4.    Photosynthesis
 Discuss Question
Answer is Option C. -> Cellular respiration
Question 5. In cellular metabolism, O2 is used
  1.    in the Krebs cycle
  2.    as a terminal electron acceptor
  3.    in glycolysis
  4.    to provide electrons for photophosphorylation
 Discuss Question
Answer is Option B. -> as a terminal electron acceptor
Question 6. The final electron acceptor in the electron transport chain is
  1.    a cytochrome
  2.    CoQ
  3.    FMN
  4.    oxygen
 Discuss Question
Answer is Option D. -> oxygen
Question 7. Glucose can be broken down to pyruvate by
  1.    none of these
  2.    tricarboxylic acid cycle
  3.    Entner-Doudoroff pathway
  4.    both (a) and (b)
 Discuss Question
Answer is Option C. -> Entner-Doudoroff pathway
Question 8. The amount of energy (cal/mole) in an ATP molecule produced by a cell from glucose by fermentation is
  1.    exactly or approximately equal to aerobic metabolism
  2.    less than aerobic metabolism
  3.    greater than aerobic metabolism
  4.    None of these
 Discuss Question
Answer is Option A. -> exactly or approximately equal to aerobic metabolism
Question 9. The enzymes for glycolysis are located
  1.    on the outer membrane of the chloroplast
  2.    in the cytoplasm
  3.    on the inner membrane of the mitochondrion
  4.    on the inner surface of the cell membrane
 Discuss Question
Answer is Option B. -> in the cytoplasm
Question 10. Which of the following best explains about the usefulness of the production of ethanol in yeast cells under anaerobic conditions?
  1.    The process generates oxygen, which is required for glycolysis
  2.    Ethanol keeps the electron transport system functioning
  3.    Yeast would be unable to activate the enzymes of the Krebs cycle without ethanol
  4.    The process regenerates NAD+, which is required for glycolysis
 Discuss Question
Answer is Option D. -> The process regenerates NAD+, which is required for glycolysis