CHAPTER 9 BACTERIAL GROWTH
EXAM WITH COMPLETE QUESTIONS
AND ANSWERS { GRADED A+}
Describe the process of bacterial reproduction - ✔✔-binary fission (single
cell divides into 2 daughter cells)
1. cell replicates in DNA
2. The cytoplasmic membrane elongates, separating DNA molecules
3. Cross wall forms; membrane invaginates
4. Cross wall forms completely
5. Daughter cells may separate
Define stages of bacterial growth curves - ✔✔1. Lag phase-- the initial
phase where bacteria are adapting to new environment. little to no cell
division occuring
2. Log (exponential) phase-- bacteria are in their most active state of
reproduction, dividing ar a constant and rapid rate
, 3. Stationary Phase-- the growth slows down and stabilizes as the number
of new cells created is roughly equal to the number of cells dying
4.Death (decline) Phase-- the number of dying cells exceeds the number of
new cells being produced, leading to a decline in the overall population
Determine the generation (doubling time) of a population of bacteria from a
set of data - ✔✔Number of generations to haveoccurred between two
populationmeasurements is determined by(logP2 - logP1) / log2
describe the process of sporogenesis - ✔✔1. Regular Cell --environment
changes
2. forms endospore
3. cell will die
4.spore turns into a regular cell
List several factors that influence the growth and survival of bacteria -
✔✔Temperature is one of the most important factors governing growth.
-every bacterium has an optimum tempt for growth but can survive withing
a range.
Describe indirect and direct methods of measuring bacterial growth -
✔✔Indirect measurements: measures population as a whole
EXAM WITH COMPLETE QUESTIONS
AND ANSWERS { GRADED A+}
Describe the process of bacterial reproduction - ✔✔-binary fission (single
cell divides into 2 daughter cells)
1. cell replicates in DNA
2. The cytoplasmic membrane elongates, separating DNA molecules
3. Cross wall forms; membrane invaginates
4. Cross wall forms completely
5. Daughter cells may separate
Define stages of bacterial growth curves - ✔✔1. Lag phase-- the initial
phase where bacteria are adapting to new environment. little to no cell
division occuring
2. Log (exponential) phase-- bacteria are in their most active state of
reproduction, dividing ar a constant and rapid rate
, 3. Stationary Phase-- the growth slows down and stabilizes as the number
of new cells created is roughly equal to the number of cells dying
4.Death (decline) Phase-- the number of dying cells exceeds the number of
new cells being produced, leading to a decline in the overall population
Determine the generation (doubling time) of a population of bacteria from a
set of data - ✔✔Number of generations to haveoccurred between two
populationmeasurements is determined by(logP2 - logP1) / log2
describe the process of sporogenesis - ✔✔1. Regular Cell --environment
changes
2. forms endospore
3. cell will die
4.spore turns into a regular cell
List several factors that influence the growth and survival of bacteria -
✔✔Temperature is one of the most important factors governing growth.
-every bacterium has an optimum tempt for growth but can survive withing
a range.
Describe indirect and direct methods of measuring bacterial growth -
✔✔Indirect measurements: measures population as a whole
