Grade 8 Ch:2 - Microorganisms: Friend or Foe Definitions

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Questions and Answers

What is the process of conservation of sugars into alcohol in the absence of oxygen called?

  • Preservation
  • Pasteurization
  • Fermentation (correct)
  • Photosynthesis

What is the term for medicines that kill or stop the growth of disease-causing microbes?

  • Antibiotics (correct)
  • Antiseptics
  • Antigens
  • Antibodies

What is the term used for disease-causing microorganisms?

  • Microbes
  • Pathogens (correct)
  • Fermenters
  • Preservatives

Which process involves heating milk to 70°C for a short duration and then immediately chilling it?

<p>Pasteurization (C)</p> Signup and view all the answers

What is the term for microbial diseases that can spread from an infected person to a healthy person through air, water, food, or physical contact?

<p>Infectious diseases (D)</p> Signup and view all the answers

How are microorganisms typically observed since they are too small to be seen with the naked eye?

<p>With the help of a microscope (A)</p> Signup and view all the answers

Which group of microorganisms are capable of preparing their own food?

<p>Algae (B)</p> Signup and view all the answers

What is the main difference between bacteria and viruses?

<p>Bacteria can multiply on their own, but viruses need a living host cell. (A)</p> Signup and view all the answers

Which microorganism is responsible for foot and mouth disease in cattle?

<p>Viruses (D)</p> Signup and view all the answers

What is the characteristic feature of fungi?

<p>They feed on decaying organic matter. (B)</p> Signup and view all the answers

Which microorganism is the smallest among all?

<p>Viruses (A)</p> Signup and view all the answers

Which microorganism requires a living host cell for multiplication?

<p>Viruses (D)</p> Signup and view all the answers

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