Brock Biology of Microorganisms Chapter 5
Exam Questions With Correct Answers
growth - CORRECT ANSWER✔✔-increase in the number of cells
| | | | | | | |
binary fission - CORRECT ANSWER✔✔-cell division following
| | | | | | |
enlargement of a cell to twice its minimum size
| | | | | | | |
septum - CORRECT ANSWER✔✔-partition between dividing cells;
| | | | | | |
pinches off between two daughter cells
| | | | |
generation time - CORRECT ANSWER✔✔-time required for microbial
| | | | | | | |
cells to double in number (can be affected by nutrition, genetics, and
| | | | | | | | | | | |
temperature)
budding division - CORRECT ANSWER✔✔-results from unequal cell
| | | | | | | |
growth and forms totally new daughter cell
| | | | | |
(also similarly involve stalks, hyphae, appendages, polar growth without
| | | | | | | | |
differentiation of cell size) | | |
planktonic growth - CORRECT ANSWER✔✔-growth as suspension
| | | | | |
,sessile growth - CORRECT ANSWER✔✔--growth when attached to
| | | | | | | |
surface
-can develop into biofilms
| | |
biofilms - CORRECT ANSWER✔✔--attach polysaccharide matrix
| | | | | |
containing embedded bacteria | |
-form in stages
| |
-prevent harmful chemicals (like antibiotics) from penetrating
| | | | | |
-prevent protists from grazing
| | |
-prevent washing away of cells
| | | |
-can affect human health, water distribution cycles, and fuel storage
| | | | | | | | |
biofilm stages of growth - CORRECT ANSWER✔✔-Stage I: planktonic
| | | | | | | | |
cells attach
|
Stage II: sticky matrix forms
| | | |
microbial mats - CORRECT ANSWER✔✔-multilayered sheets with
| | | | | | |
different organisms in each layer (ex. hot springs, intertidal regions)
| | | | | | | | |
exponential growth - CORRECT ANSWER✔✔-growth of a microbial
| | | | | | | |
population in which cell numbers double within a specific time inteval
| | | | | | | | | |
, instantaneous growth rate constant (k) - CORRECT ANSWER✔✔- | | | | | | |
expresses rate of growth at any given instant (initial increases is slow
| | | | | | | | | | | |
but gains speed)
| |
batch culture - CORRECT ANSWER✔✔-a closed-system microbial culture
| | | | | | |
of fixed volume
| | |
Phases of Microbial Growth Cycle - CORRECT ANSWER✔✔-1) Lag phase
| | | | | | | | |
2) Exponential phase
| |
3) Stationary phase
| |
4) Death phase
| |
Lag phase - CORRECT ANSWER✔✔-??? Phase
| | | | |
-interval between inoculation of a culture and beginning of growth
| | | | | | | | |
-time needed for biosynthesis of new enzymes (gene expression
| | | | | | | | |
required) and to produce required metabolite before growth can begin
| | | | | | | | |
Exponential phase (also called logarithm phase) - CORRECT
| | | | | | | |
ANSWER✔✔-??? Phase |
-cells in this phase are typically healthiest
| | | | | |
Stationary phase - CORRECT ANSWER✔✔-??? Phase
| | | | |
Exam Questions With Correct Answers
growth - CORRECT ANSWER✔✔-increase in the number of cells
| | | | | | | |
binary fission - CORRECT ANSWER✔✔-cell division following
| | | | | | |
enlargement of a cell to twice its minimum size
| | | | | | | |
septum - CORRECT ANSWER✔✔-partition between dividing cells;
| | | | | | |
pinches off between two daughter cells
| | | | |
generation time - CORRECT ANSWER✔✔-time required for microbial
| | | | | | | |
cells to double in number (can be affected by nutrition, genetics, and
| | | | | | | | | | | |
temperature)
budding division - CORRECT ANSWER✔✔-results from unequal cell
| | | | | | | |
growth and forms totally new daughter cell
| | | | | |
(also similarly involve stalks, hyphae, appendages, polar growth without
| | | | | | | | |
differentiation of cell size) | | |
planktonic growth - CORRECT ANSWER✔✔-growth as suspension
| | | | | |
,sessile growth - CORRECT ANSWER✔✔--growth when attached to
| | | | | | | |
surface
-can develop into biofilms
| | |
biofilms - CORRECT ANSWER✔✔--attach polysaccharide matrix
| | | | | |
containing embedded bacteria | |
-form in stages
| |
-prevent harmful chemicals (like antibiotics) from penetrating
| | | | | |
-prevent protists from grazing
| | |
-prevent washing away of cells
| | | |
-can affect human health, water distribution cycles, and fuel storage
| | | | | | | | |
biofilm stages of growth - CORRECT ANSWER✔✔-Stage I: planktonic
| | | | | | | | |
cells attach
|
Stage II: sticky matrix forms
| | | |
microbial mats - CORRECT ANSWER✔✔-multilayered sheets with
| | | | | | |
different organisms in each layer (ex. hot springs, intertidal regions)
| | | | | | | | |
exponential growth - CORRECT ANSWER✔✔-growth of a microbial
| | | | | | | |
population in which cell numbers double within a specific time inteval
| | | | | | | | | |
, instantaneous growth rate constant (k) - CORRECT ANSWER✔✔- | | | | | | |
expresses rate of growth at any given instant (initial increases is slow
| | | | | | | | | | | |
but gains speed)
| |
batch culture - CORRECT ANSWER✔✔-a closed-system microbial culture
| | | | | | |
of fixed volume
| | |
Phases of Microbial Growth Cycle - CORRECT ANSWER✔✔-1) Lag phase
| | | | | | | | |
2) Exponential phase
| |
3) Stationary phase
| |
4) Death phase
| |
Lag phase - CORRECT ANSWER✔✔-??? Phase
| | | | |
-interval between inoculation of a culture and beginning of growth
| | | | | | | | |
-time needed for biosynthesis of new enzymes (gene expression
| | | | | | | | |
required) and to produce required metabolite before growth can begin
| | | | | | | | |
Exponential phase (also called logarithm phase) - CORRECT
| | | | | | | |
ANSWER✔✔-??? Phase |
-cells in this phase are typically healthiest
| | | | | |
Stationary phase - CORRECT ANSWER✔✔-??? Phase
| | | | |
