Microbiology - Lecture Twenty Nine : Microbes and energy flow
5 important questions on Microbiology - Lecture Twenty Nine : Microbes and energy flow
Define the term Microbial ecology
- Microbial Ecology: The study of the interrelationships among microorganisms and their environment.
- Microbiome: ALL MICROORGANISMS and their genes in a particular environment.
- Enrichment culture: Providing the conditions that suit the thriving of particular organisms.
- Mesocosm: An experimental system that aims to match real life.
What are the basic components of microbial metabolism, energy and carbon acquisition ?
- Metabolism describes the biochemical processes that occur within a living organism.
- Breakdown of food and its transformation into energy.
- It consists of catabolism (breakdown to substances) and anabolism (building of substances)
What are the 4 key trophic groups of microorganisms ?
- An autotroph (producer) is an organism that produces its own energy using sunlight or chemical energy. They get their carbon source from CO2.
- A heterotroph (consumer) is an organism that consumes another organism for energy. They get their carbon source from “food”.
- Chemotroph oxidises inorganic chemicals for energy
- Phototrophs capture light which they use for energy.
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What is the difference between Non-cyclic photophosphorylation and Cyclic photophosphorylation ?
- Electrons flow from H2O --> PSII --> PSI --> NADP+
- Generate o2, ATP and NADPH
- PSI can work in absence of PSII
- Generates ATP but no O2 (anoxygenic)
How do microbes exploit different environments ?
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