Exam Questions / Microbiology

Environmental microbiology questions

Written by MicroDok
  • Briefly describe environmental microbiology and its significance to humanity.
  • Define bioremediation.
  • What is soil microbiology?
  • Succinctly explain biofertilizers and its benefits over chemical fertilizers.
  • What is a host-parasite relationship?
  • Define parasitism.
  • Succinctly explain microbial symbiotic associations.
  • Explain in details the different types of symbiotic associations common amongst microbes.
  • What is amensalism?
  • Different predation from competition.
  • With examples describe soil-borne pathogens.
  • Define biodeterioration.
  • What is biodegradation?
  • Briefly describe two harmful association exhibited by microbes in their habitat.
  • Succinctly explain anaerobic digestion and outline the organisms involved.
  • Define methanogenesis.
  • With suitable examples describe methanogens.
  • Define acetogenesis.
  • Using suitable examples, describe acetogens.
  • What is a landfill?
  • Describe the different stages of the MPN test.
  • Briefly describe the rhizosphere effect of the soil and its significance in improving the fertility of the soil.
  • Explain in details the factors that influence the population of microbes in the soil.
  • Enumerate the merits and demerits of MPN technique as a microbial enumeration process.
  • Describe the membrane filtration technique.
  • Succinctly explain the most probable number (MPN) method of estimating the presence of bacteria in environmental samples.
  • What are indicator organisms?
  • Why are faecal coliform bacteria referred to as indicator organisms?
  • Define soil.
  • What are membrane filters?
  • Describe in details the significance of soil microbes.
  • X-ray the factors that affect the population of soil microbes.
  • With suitable examples, describe in details the biogeochemical cycle.
  • Define greenhouse effect.
  • What are greenhouse gases?
  • Explain climate change and global warming.
  • What is nitrogen fixation?
  • Enumerate the organisms involved in nitrogen fixation.
  • Define nitrification, denitrification, ammonification and mineralization.
  • What is the biological significance of the phosphorus and oxygen cycles?
  • Succinctly explain composting.
  • What is phytoremediation?
  • Define bioaugmentation.
  • What is biostimulation?
  • X-ray the factors that affect the process of bioremediation.
  • What is bioattenuation?
  • Succinctly describe eutrophication and mention the organisms involved.
  • What is algal bloom?
  • Enumerate the environmental consequences of eutrophication.
  • Outline the factors responsible for eutrophication.
  • Describe mushroom farming and enumerate the steps involved.
  • What is biochemical oxygen demand (BOD)
  • Explain in details chemical oxygen demand (COD).
  • Briefly explain TOC and TOD.
  • Describe bioleaching and enumerate the microbial community involved.
  • What is geomicrobiology?
  • What is astrobiology?
  • What is weathering?
  • Enumerate 5 agents of weathering that you know.
  • Mention any four (4) processes in which geomicrobiology can be applied.
  • Briefly explain the application of geomicrobiology in bioremediation and bioleaching.
  • Enumerate any four (4) geomicrobes and mention one element that each metabolize.
  • What are siderophores and extremophiles?
  • Define the term aquifers.
  • What is microbial energetics?
  • Differentiate between catabolism and anabolism.
  • Enumerate the mineralytic effects of rock-eating microbes.
  • X-ray the factors that influence bioleaching activities.

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MicroDok

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