10 Questions
Which scientist(s) provided evidence that DNA was the genetic material?
Avery, MacLeod, and McCarty
What was the key hypothesis proposed by Beadle and Tatum regarding genes and enzymes?
One gene, one polypeptide
What was the key discovery made by Luria and Delbruck regarding gene mutations in bacteria?
Spontaneous gene mutations (not directed by environment)
What is a key advantage of using microorganisms as research tools?
Microorganisms can grow rapidly and in large amounts in the lab at reasonable cost
What is the key difference between prokaryotic and eukaryotic cells?
Prokaryotes have a relatively simple morphology and lack a true membrane-bound nucleus, while eukaryotes are morphologically complex and have a true, membrane-bound nucleus.
What did Pasteur and Roux discover about attenuated bacteria?
Incubating cultures longer than normal resulted in attenuated bacteria that could no longer cause disease.
What process did Pasteur develop to preserve wine during storage?
Pasteurization
What did Martinus Beijerinck and Sergei Winogradsky pioneer the use of?
Enrichment cultures and selective media
What did Sergei Winogradsky discover about soil bacteria?
They could oxidize iron, sulfur, and ammonia to obtain energy.
What did the work of Emil von Behring and Shibasaburo Kitasato involve?
Raising antibodies to inactivated diphtheria toxin for passive immunization.
Learn about the process of vaccination which involves inoculating individuals with weakened forms of microorganisms to provide protection from diseases. Explore the history of vaccination, including Pasteur and Roux's discovery of attenuated bacteria. Discover how vaccination helps in developing active immunity against diseases.
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