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.
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?
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?
Which of the following best describes a lithotroph? (1) Uses organic compounds as an energy source (2) Uses inorganic compounds as an energy source (3) Uses light as an energy source (4) Uses oxygen as a carbon source
Which of the following best describes a photoheterotroph? (1) Uses light for energy and CO₂ for carbon (2) Uses light for energy and organic compounds for carbon (3) Uses chemicals for energy and CO₂ for carbon (4) Uses chemicals for energy and organic compounds for carbon
Which of the following best describes an obligate anaerobe? (1) Requires oxygen to survive (2) Can survive with or without oxygen (3) Cannot survive in the presence of oxygen (4) Requires high salt concentration
Which of the following best describes microbial nutrition? (1) The process by which microbes obtain energy and nutrients for growth (2) The process of photosynthesis in plants (3) The process of respiration in animals (4) The process of fermentation in yeast
Fill in the blank: Microorganisms that can grow in the absence of oxygen but grow better in its presence are called __________.
Fill in the blank: Microorganisms that grow best at moderate temperatures are called __________.
Fill in the blank: Microorganisms that obtain energy from chemical compounds are called __________.
Fill in the blank: Microorganisms that require high salt concentrations for growth are called __________.
True or False: All bacteria are capable of photosynthesis.
True or False: All fungi are heterotrophic in their mode of nutrition.
True or False: All microorganisms can synthesize all the amino acids they need for growth.
True or False: All microorganisms require organic compounds as their only source of carbon.
