NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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On a growth curve, which phase represents where the number of dead cells exceeds the number of living cells until only a small portion of the population exists or vanishes completely?
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death phase
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log phase
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stationary phase
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lag phase
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Explanation:
Detailed explanation-1: -As a culture medium accumulates toxic waste and nutrients are exhausted, cells die in greater and greater numbers. Soon, the number of dying cells exceeds the number of dividing cells, leading to an exponential decrease in the number of cells (Figure 9.12).
Detailed explanation-2: -Death Phase: As nutrients become less available and waste products increase, the number of dying cells continues to rise.
Detailed explanation-3: -Dead phase: bacteria lose the ability to divide and the number of dead cells exceeds that of live cells.
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