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Biology

What is the average time period for an E. coli culture to go from lag phase to death phase? Is it 24 hours? Thank you.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter22: Prokaryotes: Bacteria And Archaea

Section: Chapter Questions

Problem 40CTQ: Researchers have discovered that washing spinach with water several times does not prevent foodborne...

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The development of microbial growth is influenced by various natural conditions (both physical and synthetic) like pH, temperature, saltiness, gas focus (O2, CO2, and H2), nutrients, water action, and assimilation. Knowing the distinctive physical and chemical factors that influence the development and endurance of microbial growth in the climate will assist with reinforcing endeavors outfitted towards their control. These lines lessen or diminish their harmful impacts on humankind, creatures, and the climate.

Question

What is the average time period for an E. coli culture to go from lag phase to death phase? Is it 24 hours?

Thank you.

Definition Definition Phase during which bacteria remain metabolically active, exhibiting an increase in cell size only. Cells mature during the lag phase but do not divide yet. During lag phase, bacteria synthesize substances necessary to facilitate growth under the new environmental conditions.

Expert Solution

Step 1

Lag phase is the the delay before the start of exponential growth.

Death phase: when cell loses viability

Step 2

Lag phase allows the adaptation which is needed for the cells of bacteria to exploit the new environmental conditions..

There is no apparent cell division here but cells grows in volume or mass, synthesize enzymes ,proteins,RNA and increase the metabolic activity.

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