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MCB 2610 Lab Practical 1 Question and answers verified to pass 2024/2025 R253,62   Add to cart
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MCB 2610 Lab Practical 1 Question and answers verified to pass 2024/2025
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MCB 2610 Lab Practical 1 Question and answers verified to pass 2024/2025 MCB 2610 Lab Practical 1 gram positive - correct answer purple cocci gram negative - correct answer pink rods endospore - correct answer responses to certain environmental conditions such as depletion of nutri...

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  • October 17, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • mcb 2610 lab practical 1
  • mcb 2610 lab practical 1 question and answers ver

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MCB 2610 Lab Practical 1
gram positive - correct answer ✔purple cocci


gram negative - correct answer ✔pink rods


endospore - correct answer ✔responses to certain environmental conditions
such as depletion of nutrients


stages of growth curve: - correct answer ✔lag, exponential (log), stationary,
death


lag phase - correct answer ✔occurs when culture is transferred to fresh
growth medium


exponential phase - correct answer ✔growth is maximal and at a steady rate,
culture is stable both chemically and physically


stationary phase - correct answer ✔cell division of new cell growth is
matched by equal amount of cell death


death phase - correct answer ✔caused by accumulation of toxic waste
products, cell damage from exposure, of chemicals in the environment


absorbance - correct answer ✔change in optical density


generation time - correct answer ✔time required by populations to double in
number

, CHNOPS - correct answer ✔carbon, hydrogen, nitrogen, oxygen,
phosphorus, sulfur


liquid media - correct answer ✔to grow large number or organisms (nutrient
broth)


solid media - correct answer ✔used to examine colony morphology of
organisms and to help isolate pure cultures


complex media - correct answer ✔chemical composition is unknown


synthetic media - correct answer ✔made of strict list of inorganic compounds
and carbon sources


general purpose media - correct answer ✔supports growth of wade range of
organisms (nutrient broth, nutrient agar, tryptic soy broth)


selective media - correct answer ✔media that selects for a certain type of
microbe by providing optimal conditions for its growth


differential media - correct answer ✔allow certain bacteria to be
differentiated from others, typically by change in color, production of clearing
zones


exoenzymes - correct answer ✔enzymes that are secreted by cells into their
environment


3 common exoenzymes - correct answer ✔amylase, caseinase, gelatinase

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