Virus Size Measurement

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Questions and Answers

Which bacterial form is characterized by a cluster or grapelike arrangement of cocci?

  • Coccobacilli
  • Staphylococci (correct)
  • Diplococci
  • Sarcinae

Which bacterial form is characterized by long threads of bacilli that have not separated into single cells?

  • Streptococci
  • Coccobacilli
  • Filamentous bacillary forms (correct)
  • Diplococci

What is the main requirement for the growth of bacteria?

  • Light
  • Carbon dioxide
  • Oxygen
  • Proper nutrients (correct)

How do bacteria enlarge and divide?

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

What is the definition of a parasite?

<p>An organism with an obligate relationship with another species, obtaining nourishment at the expense of the host (C)</p> Signup and view all the answers

What is the difference between infection and infectious disease?

<p>Infection refers to the invasion or colonization of the body by pathogenic microorganisms, whereas infectious disease refers to the host being infected and if the infection causes damage (B)</p> Signup and view all the answers

What is virulence in the context of infectious diseases?

<p>The degree of pathogenicity of a microbe in quantitative terms (B)</p> Signup and view all the answers

Why were viruses initially named 'virus'?

<p>Because they are infectious agents too small to be seen with a light microscope (A)</p> Signup and view all the answers

What is the size of an Angstrom unit (A) in comparison to a nanometre (nm)?

<p>One-tenth of a nanometre (A)</p> Signup and view all the answers

Which type of virus is the largest in size?

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

What is the composition of a virus's genome?

<p>A single nucleic acid that stores all the vital information required by the virus for its multiplication (B)</p> Signup and view all the answers

What are capsids composed of?

<p>Repeating subunits arranged in a defined pattern (B)</p> Signup and view all the answers

What industrial products can be obtained from fermentation?

<p>Alcohol, fats, and proteins (C)</p> Signup and view all the answers

Which fungal product is used for inducing uterine contractions and treating migraine?

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

What public health problem is mentioned in the text related to fungal toxins?

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

What are Actinomycetes and fungi important sources of?

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

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