Bacterial Growth and Nutrient Requirements Quiz
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Questions and Answers

What is the approximate doubling time for Escherichia coli?

  • 10 minutes
  • 1 hour
  • 30 minutes
  • 20 minutes (correct)
  • In bacterial growth, what is the term used to describe the process where one parent cell divides to form 2 progeny cells?

  • Binary fission (correct)
  • Simple division
  • Exponential growth
  • Fragmentation
  • Which of the following is NOT an environmental condition governing bacterial growth according to the text?

  • Influence of nitrogen (correct)
  • Influence of CO2
  • Influence of temperature
  • Influence of O2
  • What is required for bacterial growth in terms of nutrients according to the text?

    <p>Nutrients for metabolism and energy</p> Signup and view all the answers

    In the bacterial growth cycle, how many cells are there after 4 rounds of binary fission?

    <p>24</p> Signup and view all the answers

    What is one of the factors influencing bacterial growth mentioned in the text?

    <p>Influence of hydrogen-ion concentration (pH)</p> Signup and view all the answers

    During which phase of bacterial growth do bacteria cells divide rapidly at a logarithmic rate?

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

    What phase of bacterial growth is characterized by a steady state represented by a straight horizontal line in the growth curve?

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

    Which factor influences bacterial growth in vivo and refers to the ability of the microorganism to produce disease?

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

    What is the term used to measure the number of organisms required to cause disease?

    <p>Infectious dose</p> Signup and view all the answers

    Opportunistic pathogens can cause serious infections in immunocompromised patients but rarely cause disease in immunocompetent individuals. Where are these pathogens usually found?

    <p>In the human body's normal flora</p> Signup and view all the answers

    What phase of bacterial growth is marked by a gradual decline in the number of viable bacteria?

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

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