(Old Syllabus) Bacterial Growth Phases
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Questions and Answers

During which phase of bacterial growth does cell division stop due to nutrient depletion and toxic product accumulation?

  • Log or Exponential phase
  • Lag phase
  • Stationary phase (correct)
  • Phase of Decline

What characterizes the Log or Exponential phase of bacterial growth?

  • Cell division stops
  • Smaller cells, stain uniformly (correct)
  • Maximum cell size
  • Irregular staining, sporulation, and exotoxin production

How are bacterial counts affected in the Stationary phase?

  • Increase exponentially
  • Remain stationary due to equilibrium between dying and new cells (correct)
  • Decrease due to autolytic enzymes
  • Reach maximum count

What method can be used to obtain the Total Count of bacterial cells?

<p>Direct counting under a microscope using counting chambers (C)</p> Signup and view all the answers

Which phase is characterized by the production of autolytic enzymes leading to a decrease in population?

<p>Phase of Decline (C)</p> Signup and view all the answers

What is the key feature of the Lag phase of bacterial growth?

<p>No increase in cell size (A)</p> Signup and view all the answers

Which method measures the number of living bacterial cells specifically?

<p>Viable cell count method (A)</p> Signup and view all the answers

What happens to the number of living and dead cells in the Total Count method?

<p>Both living and dead cells are counted (C)</p> Signup and view all the answers

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