MPL4

• Microorganisms that thrive in high-pressure environments, such as deep-sea hydrothermal vents, are known as:

  • Thermophiles
  • Acidophiles
  • Alkaliphiles
  • Barophiles

  Thermophiles
• Which of the following factors is NOT typically considered a factor that affects microbial growth?

  • Light intensity
  • Carbon dioxide levels
  • Humidity
  • DNA sequence

  DNA sequence
• The process of slowing down or stopping the growth and reproduction of microorganisms by lowering the temperature is called:

  • Sterilization
  • Disinfection
  • Pasteurization
  • Refrigeration

  Disinfection
• What is the temperature kill all viable microorganisms?

  • 15 psi
  •  10 psi
  • 8 psi
  • 5 psi

  15 psi
• Which factor refers to the pressure exerted by gases dissolved in a liquid and can impact the growth of microorganisms?

  • Barometric pressure
  • Atmospheric pressure
  • Osmotic pressure
  • Hydrostatic pressure

  Barometric pressure
• In terms of pH, microorganisms that thrive in environments with a pH of 2 are known as:

  • Acidophiles
  •  Halophiles
  • Alkaliphiles
  • Neutrophiles

  Acidophiles
• Which of the following factors refers to the minimum temperature at which a microorganism can grow and reproduce?

  • Optimal temperature
  • Maximum temperature
  • Psychrophilic temperature
  • Minimum temperature

  Optimal temperature
• What is the arrangement of the diplococci?

  • Single or Pairs
  •  Curved
  • Spiral
  • Chains

  Single or Pairs
• Which of the following terms describes microorganisms that require oxygen for growth but at lower levels than atmospheric concentration?

  • Aerobes
  • Facultative anaerobes
  • Obligate anaerobes
  • Microaerophiles

  Microaerophiles
• What is the shape of the bacteria Escherichia coli?

  • Cocci
  • Bacilli
  • Spiral

  Bacilli