Chapter 5.5 Quantitative Aspects of Microbial Growth

Question 1

Which have shorter life spans, Bacteria or Eukaryotic microbes?

Answer 1

Bacteria

Question 2

Generation time is dependent on what 2 conditions?

Answer 2

Growth Medium and incubation

Question 3

Growth of a microbial population in which cell numbers double within a specific time interval.

What is this called?

Answer 3

Exponential Growth

Question 4

Does a relationship exists between the initial number of cells present in a culture and the number present after a period of exponential growth?

Answer 4

Yes

Equation of relationship is:

N = (N0)(2^n)

N is the final cell number
N0 is the initial cell number
n is the number of generations during
the period of exponential growth

Question 5

What is the equation to calculate an exponentially growing population?

Answer 5

g = t/n

t is the duration of exponential growth
n is the number of generations during
the period of exponential growth

Question 6

The constant (k) is known as what and how is it calculated?

Answer 6

Specific growth rate

k = 0.301/g

g = generation time

Question 7

(v) is known as what and how is it calculated?

Answer 7

Division rate

v = 1/g

g = generation time