Microbial Nutrition
Biology ⇒ Microorganisms and Microbiology
Microbial Nutrition starts at 9 and continues till grade 12.
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A scientist is studying a bacterium that grows only in the presence of organic carbon sources and cannot use light or inorganic compounds for energy. What is the nutritional classification of this bacterium?
Define the term 'chemolithoautotroph'.
Describe the difference between simple diffusion and facilitated diffusion in microbial cells.
Describe the role of nitrogen in microbial nutrition.
Describe the role of permeases in microbial nutrition.
Describe the role of sulfur in microbial nutrition.
Explain the difference between an obligate aerobe and a facultative anaerobe in terms of nutritional requirements.
Explain why iron is often a limiting nutrient for microbial growth in natural environments.
Explain why some microorganisms require growth factors in their medium.
Explain why trace elements are important for microbial growth.
Name one example of a micronutrient required by microorganisms.
Name the main energy currency molecule used in active transport by microorganisms.
Name the process by which microorganisms take up dissolved nutrients from their environment.
Name two essential macronutrients required by all microorganisms.
What is the main difference between a prototroph and an auxotroph?
A researcher isolates a microorganism from a deep-sea hydrothermal vent. The organism uses hydrogen sulfide (H2S) as an energy source and carbon dioxide (CO2) as a carbon source. Classify this microorganism based on its nutritional type and justify your answer.
Compare and contrast the nutritional strategies of obligate parasites and free-living saprophytic microorganisms.
Describe how the availability of phosphorus can limit microbial growth in aquatic environments, and explain one adaptation microorganisms may use to overcome phosphorus limitation.
Explain the ecological significance of mixotrophic microorganisms in nutrient-poor environments.
Explain the mechanism by which ABC transporters facilitate nutrient uptake in microorganisms, and discuss how this process differs from simple diffusion.
