15 Questions
Which process involves the breakdown (oxidation) of food into small subunits and energy?
Catabolism
Where does the synthesis of micromoles into macromoles occur?
In the cytoplasm
Which bacteria get energy from solar light?
Photosynthetic bacteria
What is the universal intermediate formed from small subunits in microbial metabolism?
Pyruvic acid
Where does the conversion of pyruvate into CO2, H+, energy, and electrons occur?
Tricarboxylic acid cycle (Krebs's cycle)
Microbial metabolism involves only anabolism and not catabolism.
False
The tricarboxylic acid cycle (Krebs's cycle) occurs under both aerobic and anaerobic conditions.
False
Chemosynthetic bacteria obtain energy from solar light.
False
The breakdown of macromolecules into micromoles and energy is a part of catabolism.
True
Glycolysis yields a significant amount of ATP under both aerobic and anaerobic conditions.
False
Electron transport chain occurs under both aerobic and anaerobic conditions.
True
Photosynthetic bacteria obtain energy from solar light.
True
The breakdown of macromolecules into micromoles and energy is a part of catabolism.
True
The tricarboxylic acid cycle (Krebs's cycle) yields a significant amount of ATP.
False
Microbial metabolism involves the synthesis of micromoles into macromoles but not the breakdown (oxidation) of food.
False
Study Notes
Microbial Metabolism
- The process that involves the breakdown (oxidation) of food into small subunits and energy is microbial metabolism.
- Microbial metabolism involves both catabolism (breakdown of macromolecules into micromoles and energy) and anabolism (synthesis of micromoles into macromoles).
Energy Production
- Photosynthetic bacteria obtain energy from solar light.
- Chemosynthetic bacteria do not obtain energy from solar light.
Cellular Respiration
- The breakdown of macromolecules into micromoles and energy (catabolism) occurs in three stages: glycolysis, tricarboxylic acid cycle (Krebs's cycle), and electron transport chain.
- Glycolysis does not yield a significant amount of ATP under both aerobic and anaerobic conditions.
- The tricarboxylic acid cycle (Krebs's cycle) only occurs under aerobic conditions and does not yield a significant amount of ATP.
- Electron transport chain only occurs under aerobic conditions.
- The conversion of pyruvate into CO2, H+, energy, and electrons occurs in the electron transport chain.
Key Molecules
- Acetyl-CoA is the universal intermediate formed from small subunits in microbial metabolism.
Test your knowledge on microbial metabolism with this quiz. Topics include catabolism, anabolism, metabolic enzymes, and the source of energy in bacteria.
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