NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The phase of the bacterial growth curve that shows the maximum rate of cell division is the
A
lag phase.
B
log phase.
C
stationary phase.
D
death phase.
Explanation: 

Detailed explanation-1: -Exponential (Log) Phase: After the lag phase, bacterial cells enter the exponential or log phase. This is the time when the cells are dividing by binary fission and doubling in numbers after each generation time.

Detailed explanation-2: -Log Phase of Bacterial Growth The log phase, short for the logarithmic or exponential growth phase, is when bacterial cells actively divide by binary fission and exponentially increase in number after each generation time. During this phase, the bacterial population reaches its maximum rate of reproduction.

Detailed explanation-3: -Following a period during which the growth rate of the cells gradually increases, the cells grow at a constant, maximum rate and this period is known as the log, or exponential, phase and the increase in biomass concentration will be proportional to the initial biomass concentration.

Detailed explanation-4: -Log phase, also referred to as the exponential phase or logarithmic phase, is one of the phases observed in a bacterial growth curve. The striking feature of this phase is the property of cell doubling through binary fission. The count of bacteria (new) that appear each time is proportionate to the current population.

Detailed explanation-5: -ˈlȯg-, ˈläg-: the period of growth of a population of cells (as of a microorganism) in a culture medium during which numbers increase exponentially and which is represented by a part of the growth curve that is a straight line segment if the logarithm of numbers is plotted against time. called also logarithmic phase.

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