Energy Release And Conservation(Microbiology ) Questions and Answers
Question 1. Organisms can synthesize ATP by oxidative phosphorylation when they
oxidize glucose to pyruvate
pass electrons to oxygen through an electron transport system containing cytochromes
ferment
pass electrons from the oxidation of chlorophyll through an electron transport system
Explanation:-
Answer: Option B. -> pass electrons to oxygen through an electron transport system containing cytochromes
Question 2. In glycolysis, ATP is created by
the chemiosmotic mechanism
substrate level phosphorylation
photophosphorylation
the pentose phosphate pathway
Explanation:-
Answer: Option B. -> substrate level phosphorylation
Question 3. How many molecules of carbon dioxide will be given off during ten turns of the Krebs cycle?
40
20
30
10
Explanation:-
Answer: 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?
Cell wall synthesis
Mitosis
Cellular respiration
Photosynthesis
Explanation:-
Answer: Option C. -> Cellular respiration
Question 5. In cellular metabolism, O2 is used
in the Krebs cycle
as a terminal electron acceptor
in glycolysis
to provide electrons for photophosphorylation
Explanation:-
Answer: Option B. -> as a terminal electron acceptor
Question 6. The final electron acceptor in the electron transport chain is
a cytochrome
CoQ
FMN
oxygen
Explanation:-
Answer: Option D. -> oxygen
Question 7. Glucose can be broken down to pyruvate by
none of these
tricarboxylic acid cycle
Entner-Doudoroff pathway
both (a) and (b)
Explanation:-
Answer: 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
exactly or approximately equal to aerobic metabolism
less than aerobic metabolism
greater than aerobic metabolism
None of these
Explanation:-
Answer: Option A. -> exactly or approximately equal to aerobic metabolism
Question 9. The enzymes for glycolysis are located
on the outer membrane of the chloroplast
in the cytoplasm
on the inner membrane of the mitochondrion
on the inner surface of the cell membrane
Explanation:-
Answer: 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?
The process generates oxygen, which is required for glycolysis
Ethanol keeps the electron transport system functioning
Yeast would be unable to activate the enzymes of the Krebs cycle without ethanol
The process regenerates NAD+, which is required for glycolysis
Explanation:-
Answer: Option D. -> The process regenerates NAD+, which is required for glycolysis