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matrenka [14]
3 years ago
7

How did john snow use maps to study the spread of cholera?

Biology
1 answer:
viva [34]3 years ago
8 0

Dr. Snow believed sewage dumped into the river or into cesspools near town wells could contaminate the water supply, leading to a rapid spread of disease. In August of 1854 Soho, a suburb of London, was hit hard by a terrible outbreak of cholera.

The pandemic was the work of a 'super-virus' The 1918 flu spread rapidly, killing 25 million people in just the first six months. ... It's now thought that many of the deaths were due to the development of bacterial pneumonias in lungs weakened by influenza.

The WHO recommends strategies on how to prevent malaria transmission by controlling the mosquito population and on how to diagnose and treat malaria infections. There are two main prevention methods: Protective bed nets treated with long-lasting insecticides prevent bites from malaria-infected mosquitoes and kill them.

Edward Jenner. In 1775 Jenner began to study the relationship between cowpox (a comparatively harmless disease) and the more dangerous and disfiguring smallpox. ... He hypothesized that exposure to cowpox rendered the body immune from smallpox. After nearly twenty years of experiments, he developed the first vaccine.

I don't know how effective the shot was sorry

sources: knarf.english.upenn.edu/People/jenner.html

https://www.greenfacts.org/en/malaria/l-2/2-prevention-treatment-strategies.htm

https://www.smithsonianmag.com/.../ten-myths-about-1918-flu-pandemic-180967810/

www.ph.ucla.edu/epi/snow/snowcricketarticle.html

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The citric acid cycle is a stage of catabolism that oxidizes acetate into carbon dioxide and generates energy. There are eight e
Delicious77 [7]

Answer:

1. isocitrate dehydrogenase,  malate dehydrogenase,  α‑ketoglutarate dehydrogenase

2. α-ketoglutarate dehydrogenase and Isocitrate dehydrogenase

3. Succinyl coenzyme A synthetase

4. α‑ketoglutarate dehydrogenase

5. aconitase

Explanation:

The citric acid cycle is a stage of catabolism in which the oxidation of acetyl-CoA takes place which releases stored energy. it takes place in the matrix of the mitochondria (in eukaryotes) or in cytoplasm (in prokaryotes).

1. All the  dehydrogenase produces NADH in citric acid cycle except succinate dehydrogenase as it inhibit other dehydrogenase enzymes activity. <em>so, Isocitrate dehydrogenase (in second step),  α‑ketoglutarate dehydrogenase (in third step) , and malate dehydrogenase (in eigthth step or final step)  </em>are responsible to produces a coenzyme, NADH.

2.  Isocitrate dehydrogenase (in third step) form one carbon dioxide and one NADH and α-ketoglutarate dehydrogenase (in fourth step) form four-carbon succinyl CoA. hence both the enzymes  produces carbon dioxide in the citric acid cycle.

3. Succinyl coenzyme A synthetase catalyzes the formation of coenzyme-A and succinate.

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5. Aconitase catalyzes the isomerization of citrate to isocitrate.

Hence, the correct answer is:

1. isocitrate dehydrogenase,  malate dehydrogenase,  α‑ketoglutarate dehydrogenase

2. α-ketoglutarate dehydrogenase and Isocitrate dehydrogenase

3. Succinyl coenzyme A synthetase

4. α‑ketoglutarate dehydrogenase

5. aconitase

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2 years ago
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