SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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25
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12
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5
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1
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Detailed explanation-1: -The rate of exponential growth of a bacterial culture is expressed as generation time, also the doubling time of the bacterial population. Generation time (G) is defined as the time (t) per generation (n = number of generations). Hence, G=t/n is the equation from which calculations of generation time (below) derive.
Detailed explanation-2: -The bacterium doubles every half hour. One hour has two half hours. Thus, 24 hours have 48 half hours. Thus the number of bacteria in the community after 24 hours is 248 .
Detailed explanation-3: -In this example the bacteria divides every 20 minutes, and therefore will divide three times every hour ( 60 20 = 3 ). Bacteria at the end of the growth period = bacteria at the beginning × 2 number of divisions of the growth period. More items