29 Questions
What is the primary function of the electron transport system in aerobic respiration?
To transfer electrons from the substrate to the final electron acceptor, oxygen, using a series of electron carriers
What is the main difference between aerobic and anaerobic respiration?
Aerobic respiration uses oxygen as the final electron acceptor, while anaerobic respiration uses a different electron acceptor such as sulfate or nitrate
What is the role of the Krebs cycle in anaerobic respiration?
The Krebs cycle is only partially involved in anaerobic respiration, as it lacks the final steps of the electron transport chain
What is the role of methane-producing bacteria in anaerobic respiration?
Methane-producing bacteria convert carbon dioxide and hydrogen into methane as a byproduct of anaerobic respiration
What is the role of sulfate reducers in anaerobic respiration?
Sulfate reducers use sulfate as the final electron acceptor, reducing it to sulfide
What is the primary purpose of fermentation in microorganisms?
Fermentation is used to produce ATP when an organism cannot respire due to the lack of an inorganic electron acceptor or the absence of an electron transport system
Where does the Krebs Cycle (Citric Acid Cycle, TCA) take place?
Cytoplasmic membrane
What is the end product generated when Acetyl CoA is oxidized in the Krebs Cycle?
CO2 and oxaloacetate
What is the final product of the Electron Transport System in respiration?
ATP
Which process involves a sequence of carrier molecules through which electrons pass?
Electron Transport System
What is the function of the respiratory chain (cytochrome system) in bacteria?
Generate water
At which points along the respiratory chain does oxidative phosphorylation occur?
Multiple points
What is the primary purpose of the catabolic process in bacterial metabolism?
To convert large substrates into smaller building blocks
Which of the following is NOT one of the high-energy transfer compounds mentioned in the text?
NADH
What is the primary role of anabolism in bacterial metabolism?
To convert the building blocks into activated monomers and then polymerize them into macromolecules
Which of the following is NOT a function of high-energy transfer compounds in bacterial metabolism?
To provide energy for the transport of cell structures
Which of the following is the most important high-energy transfer compound in bacterial cells?
ATP
What is the main ATP generating pathway discussed in the text?
Glycolysis
In which type of metabolism does fermentation occur according to the text?
Anaerobic respiration
What determines the type of fermentation end products produced?
Type of organism, original substrate, and active enzymes
Which metabolic strategy involves pathways like Glycolysis, TCA, and Electron Transport Chain?
Aerobic respiration
What type of enzymes are synthesized inside microbial cells regardless of substrate presence?
Constitutive enzymes
Why are induced enzymes of great economic importance to the cell?
They are only produced when needed, saving energy
What is the main trigger that stops the synthesis of an enzyme?
The cell reaches a certain concentration of the product
What type of control mechanism is used to regulate the enzymes involved in biosynthesis (anabolism)?
End-product repression
What is the primary mechanism by which the end-product inhibits the activity of an enzyme?
By binding to the active site of the enzyme
Which of the following statements about feedback inhibition is correct?
Feedback inhibition involves the end-product inhibiting the first enzyme in the pathway
How does end-product repression differ from end-product inhibition?
End-product repression inhibits enzyme synthesis, while end-product inhibition inhibits enzyme activity
What is the primary difference between the regulation of enzymes involved in biosynthesis (anabolism) and those involved in catabolism?
Enzymes involved in anabolism are regulated by feedback inhibition, while those involved in catabolism are regulated by induction
Explore the catabolism processes in bacterial metabolism, focusing on the oxidation of large substrates into smaller units and the elaboration of energy stored in ATP molecules. Learn how microorganisms carry out metabolic reactions.
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