Microbial Culture — Practice Quiz
CBSE · Class 12 · Biotechnology
Try a 4-question quiz on Microbial Culture for CBSE Class 12 Biotechnology: tap an answer to check it and see why. 63 questions in the full chapter test.
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Who developed the microscope in the 1670s to 1680s and coined the term animalcules?
What did Lazzaro Spallanzani observe in boiled broth?
Which scientist performed swan-neck flask experiments to disprove spontaneous generation?
Which scientist proved the germ theory by injecting pure cultures of Bacilli into mice and causing anthrax?
Sample Questions
Which period is called the Golden Age of Microbiology?
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Late 1800s to early 1900s
The late 1800s to early 1900s are called the Golden Age of Microbiology because many disease-causing microorganisms were discovered then.
What medium did Louis Pasteur use in 1860 for microbial growth?
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A medium containing yeast, ash and ammonium salts
Pasteur used a medium containing yeast, ash and ammonium salts, which supplied nutrients needed for growth.
Why did Ferdinand Cohn refine Pasteur's medium?
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By varying the types of sugars to make a more versatile basal medium
Ferdinand Cohn refined Pasteur's medium by varying sugar types so that the medium became more versatile.
In 1881, why did Robert Koch consider using solid media?
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Broth media made isolation of pure cultures difficult
Koch recognised the difficulties of using broth media for isolation and therefore considered solid media.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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