Pharm D Program (2023/2024) - Microbial Growth Lecture
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the ultimate goal of living organisms?

  • To use their own enzymes to reproduce by division
  • To reproduce and transfer their genetic material to future generations (correct)
  • To obtain energy from food or solar radiation
  • To obtain nutrients from the environment or the host
  • Which of the following is not a requirement for microbial growth?

  • Source of nutrients
  • Optimal temperature
  • Absence of oxygen (correct)
  • Source of energy (food or solar radiation)
  • Which environmental factor does the text discuss in the most detail?

  • Effect of temperature
  • Effect of molecular oxygen (O2) (correct)
  • Effect of pH
  • Effect of moisture
  • What is the purpose of the lecture's competencies?

    <p>All of the above</p> Signup and view all the answers

    What is the main purpose of the lecture?

    <p>To provide students with knowledge about the process of microbial growth and its requirements</p> Signup and view all the answers

    Which of the following is not a topic covered in the lecture's contents?

    <p>Microbial Reproduction</p> Signup and view all the answers

    What are the major elements or macronutrients required by a microbial cell?

    <p>C, N, O, H, P, S, Na, K, Cl, Mg, Ca, Fe</p> Signup and view all the answers

    What is the classification of bacteria based on their carbon source?

    <p>Autotrophs (Lithotrophs) and Heterotrophs (Chemoheterotrophs)</p> Signup and view all the answers

    Which bacteria can fix atmospheric nitrogen and reduce it to ammonia?

    <p>Rhizobium</p> Signup and view all the answers

    What is the energy source for organisms that use solar energy?

    <p>Light</p> Signup and view all the answers

    What are the minor (trace) elements or micronutrients required by a microbial cell?

    <p>Co, Cu, Mn, Mo, Ni, Se, Zn</p> Signup and view all the answers

    What type of bacteria can use inorganic nitrogen as an energy source and inorganic carbon (CO2) as a carbon source?

    <p>Autotrophs (Lithotrophs)</p> Signup and view all the answers

    Why is suitable environmental conditions important for microbial growth?

    <p>To provide nutrients for metabolic reactions</p> Signup and view all the answers

    Which of the following is NOT an environmental factor that affects microbial growth?

    <p>CO2 concentration</p> Signup and view all the answers

    What is the classification of bacteria that can only grow in the absence of O2?

    <p>Obligate anaerobes</p> Signup and view all the answers

    Which bacterial group uses O2 as a final electron acceptor in aerobic respiration?

    <p>Obligate aerobes</p> Signup and view all the answers

    What do obligate anaerobes use for energy yielding reactions?

    <p>Water (H2O)</p> Signup and view all the answers

    Which bacteria can grow in the presence or absence of O2?

    <p>Facultative anaerobes</p> Signup and view all the answers

    What is the preferred pH range for molds?

    <p>5.5</p> Signup and view all the answers

    Which type of microorganisms grow best at neutral pH?

    <p>Neutrophiles</p> Signup and view all the answers

    What is the optimum temperature range for mesophiles?

    <p>30-40°C</p> Signup and view all the answers

    Which organism is an example of a thermophile?

    <p>Thermus aquaticus</p> Signup and view all the answers

    What is the optimum temperature range for fungal growth?

    <p>20-25°C</p> Signup and view all the answers

    Which term is used to describe organisms that live in dry environments?

    <p>Xerophiles</p> Signup and view all the answers

    During which growth phase do bacteria multiply rapidly by binary fission at a constant rate?

    <p>Exponential phase</p> Signup and view all the answers

    What type of metabolites, like vitamins and amino acids, are primarily produced during the exponential growth phase?

    <p>Primary metabolites</p> Signup and view all the answers

    In which growth phase is there equilibrium between living cells and dying ones with growth rate equal to death rate?

    <p>Stationary phase</p> Signup and view all the answers

    What happens to the number of viable cells during the stationary phase?

    <p>Remains almost constant</p> Signup and view all the answers

    Which factors limit population growth during the stationary phase?

    <p>Accumulation of secondary metabolites</p> Signup and view all the answers

    What does the rate of exponential growth of a bacterial culture express during the logarithmic phase?

    <p>Generation time</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser