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 11
A culture medium contains glucose, ammonium chloride, magnesium sulfate, and water. Which type of microorganism can grow in this medium?
A student observes that a certain bacterium grows only at the bottom of a test tube of thioglycollate broth. What does this indicate about the bacterium's oxygen requirement?
Describe the importance of water in microbial nutrition.
Describe the role of sulfur in microbial nutrition.
Describe the role of trace elements in microbial nutrition.
Explain the difference between a defined (synthetic) medium and a complex medium in microbial nutrition.
A culture medium contains glucose, ammonium chloride, magnesium sulfate, and water. Which type of microorganism can grow in this medium?
A student observes that a certain bacterium grows only at the bottom of a test tube of thioglycollate broth. What does this indicate about the bacterium's oxygen requirement?
Which of the following best describes a chemoheterotroph?
(1) Uses light for energy and CO2 for carbon
(2) Uses organic compounds for both energy and carbon
(3) Uses inorganic compounds for energy and CO2 for carbon
(4) Uses light for energy and organic compounds for carbon
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 organic compounds for both energy and carbon
(4) Uses inorganic compounds for energy and CO2 for carbon
Which of the following best describes an autotrophic microorganism?
(1) It obtains energy from organic compounds.
(2) It synthesizes its own food from inorganic substances.
(3) It requires pre-formed organic molecules.
(4) It cannot survive without a host.
Which of the following is a function of potassium in microbial cells?
(1) Component of nucleic acids
(2) Enzyme activation
(3) Structural component of cell wall
(4) Electron transport
Fill in the blank: Microorganisms that grow best at moderate temperatures (20–45°C) are called __________.
Fill in the blank: Microorganisms that grow best at pH values below 5.5 are called __________.
Fill in the blank: Microorganisms that require high concentrations of salt for growth are called __________.
Fill in the blank: Microorganisms that require organic compounds as their carbon source are called __________.
True or False: All bacteria can use atmospheric nitrogen directly for their nutrition.
True or False: All microorganisms can synthesize their own vitamins.
True or False: All microorganisms require the same nutrients for growth.
True or False: Facultative anaerobes can grow in both the presence and absence of oxygen.
