Micro-organisms and Their Characteristics

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Questions and Answers

What are microorganisms or microbes?

  • Living organisms that can only be seen with a microscope (correct)
  • Living organisms that can be seen with the unaided eye
  • Non-living organisms that are visible to the naked eye
  • Non-living organisms that can only be seen with a magnifying glass

What is a common observation about moist bread during the rainy season?

  • Its surface gets covered with greyish white patches (correct)
  • It becomes harder
  • It turns red in color
  • It starts smelling like roses

Why are microorganisms called 'microorganisms'?

  • Because they are very large in size
  • Because they can only be seen under a microscope (correct)
  • Because they are colored microscopically
  • Because they are invisible to the naked eye

What can be observed by spreading a drop of moist soil on a slide and looking under a microscope?

<p>Black rounded structures (D)</p> Signup and view all the answers

Why do some microorganisms require the help of a microscope to be seen?

<p>Because they are too small to be seen with the unaided eye (D)</p> Signup and view all the answers

What is the significance of observing water and soil under a microscope for microorganisms?

<p>To prove the presence of invisible microorganisms (D)</p> Signup and view all the answers

Which of the following is a common example of a pathogenic bacterium?

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

How do pathogenic microorganisms primarily spread among humans?

<p>Via direct contact, inhalation, ingestion, or through vectors (B)</p> Signup and view all the answers

Which of the following is an example of a pathogenic virus?

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

What is a characteristic feature of pathogenic fungi like Candida?

<p>They can invade tissues and cause diseases (D)</p> Signup and view all the answers

In what ways can pathogenic microorganisms be transmitted indirectly?

<p>Via vectors like mosquitoes and ticks (A)</p> Signup and view all the answers

What distinguishes pathogenic microorganisms from non-pathogenic ones?

<p>Their potential to cause diseases in humans, animals, and plants (A)</p> Signup and view all the answers

What was a devastating plague that swept across Europe during the Middle Ages?

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

How do vaccines help in controlling pathogenic microorganisms?

<p>By targeting specific parts of bacteria (B)</p> Signup and view all the answers

What is a consequence of overuse and misuse of antibiotics?

<p>Contribution to antibiotic resistance (A)</p> Signup and view all the answers

How does proper handwashing help in preventing the spread of pathogenic microorganisms?

<p>By neutralizing pathogens (C)</p> Signup and view all the answers

What method helps limit the spread of vector-borne diseases?

<p>Vector control measures (D)</p> Signup and view all the answers

Why is understanding the role of microorganisms important for human health and global ecosystems?

<p>To appreciate the interconnectedness of life (C)</p> Signup and view all the answers

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