Microbial Nutrition
Biology ⇒ Microorganisms and Microbiology
Microbial Nutrition starts at 9 and continues till grade 12.
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See sample questions for grade 10
A culture medium contains glucose, ammonium chloride, magnesium sulfate, and trace elements. Which type of microorganism would be able to grow in this medium?
A scientist is growing bacteria in a medium that lacks any organic carbon source but contains CO₂ and light. What type of nutrition is the bacterium likely using?
Define the term 'autotroph' as it relates to microbial nutrition.
Describe the difference between macronutrients and micronutrients in microbial nutrition.
Describe the role of nitrogen in microbial nutrition.
Describe the role of vitamins in microbial nutrition.
Explain the difference between a photoautotroph and a chemoautotroph.
Explain the difference between simple diffusion and active transport in microbial nutrient uptake.
Explain the importance of magnesium in microbial nutrition.
Explain why trace elements are important for microbial nutrition.
Explain why water is essential for microbial nutrition.
A culture of bacteria is growing in a medium with limited iron. The bacteria begin to secrete molecules that bind iron tightly and transport it into the cell. What are these molecules called, and why are they important for microbial nutrition?
A researcher observes that a certain bacterium can grow in a medium containing only hydrogen sulfide (H₂S), carbon dioxide (CO₂), and mineral salts, but not in a medium containing only glucose and mineral salts. What does this suggest about the nutritional type of the bacterium?
Describe the process by which microorganisms transport nutrients against a concentration gradient and explain why this process requires energy.
Explain how the availability of different carbon and energy sources in the environment can influence the composition of a microbial community in a natural ecosystem.
Explain why obligate parasites often have complex nutritional requirements compared to free-living microorganisms.
