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MICR 221 EXAM QUESTIONS WITH ANSWERS ALL REVISED AND UPDATED

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MICR 221 EXAM QUESTIONS WITH ANSWERS ALL REVISED AND UPDATED Pneumonic plague - Answer-lung infection, can spread from human to human. When people cough, tiny droplets move through the air, Plague - Answer-1st use of quarantine, not very useful. killed one third of European population. First...

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  • August 29, 2024
  • 2
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • micr 221
  • pneumonic plague
  • micr 221 exam questions with answers

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  • MICR 221
  • MICR 221

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MICR221 EXAM QUESTIONS WITH
REVISED ANSWERS
Commensal/Mutualistic bacteria of the GI tract - Answer-Lactobacillus, Bacteriodes,
Bifidobacterium, Clostridium, Escherichia, Enterococcus

Anaerobes in large intestine - Answer-Bacteriodes, Bifidobacterium, and Clostridium

Bacteria adapted to stomach's low pH - Answer-Helicobacter

Urease - Answer-Enzyme used for acid tolerance by Helicobacter

Aerobes - Answer-Require molecular oxygen and final electron acceptor is oxygen.

Anaerobes - Answer-Prefer absence of oxygen. also known as fermentation

Final electron acceptor in anaerobic respiration - Answer-is exogenous, e.g. nitrate,
sulphate.

Electron acceptor in fermentation - Answer-pyruvate

fermentation involves - Answer-ATP is synthesized by substrate level phosphorylation.

Facultative anaerobes - Answer-Can grow with or without oxygen

Microaerophiles - Answer-require little oxygen but not too much

Capnophiles - Answer-Require increased levels of carbon dioxide.

psychrophiles - Answer--5 to 17 degrees

psychrotrophs - Answer--2 to 35 degrees

mesophiles - Answer-15 to 45 degrees

thermophiles - Answer-42 to 80 degrees

hyperthermophiles - Answer-65 to 105 degrees
Symbiosis - Answer-Living together of organisms

Four types of Symbiosis - Answer-Commensalism, Mutualism, Pathogenesis and
Parasitism

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