Home
Project
Workshop
Nodal Centres
Apply for Nodal Centre Program
Nodal Centre List
Free online demo
Nodal Centre Inaugurations
Unique Login ID
News & Events
Publications
Survey
Faculty Survey
Student Survey
Contact us
Login
.
you are here->
home
->
Biotechnology and Biomedical Engineering
->
Microbiology Virtual Lab I
->
Bacterial Growth Curve
.
.
Bacterial Growth Curve
.
.
Theory
Procedure
Self Evaluation
Animation
Simulation
Assignment
Reference
Feedback
NPTEL Video
1)
The actively growing and metabolizing phase of the bacterial growth is
Death phase
Stationary phase
Lag phase
Logarithmic phase
2)
The microorganism starts producing inhibitory compounds in stationary phase. This is because
Growth rate and death rate of the microorganisms are equilibrated
Rapid multiplication of organism in the log phase exploited most nutrients; hence the organism is competing for available nutrients
The organism stops its growth
None of the above
3)
An old culture of Escherichia coli is inoculated into a fresh media. The lag phase of the organism is then
Reduced
Remains constant
Increased
None of the above
4)
Optical density is the measure of
Transmittance
Absorbance
Wavelength of light
Width of cuvette
5)
A researcher introduced Staphylococcus aureus into Mannitol salt broth from Nutrient broth. He observed that the organism experience a long lag phase. This is because
Mannitol Salt Broth does not promote the growth of Staphylococcus aureus
Lack of sufficient inoculum
The organism is in replicating phase
The organism needs some time to adapt with the new environment
6)
The growth rate of bacteria is in
Observed mean
Harmonic mean
Arithmetic mean
Geometric mean
7)
The order of the four phases of the growth curve of a bacterial culture are
Lag, Stationary, Exponential, Death
Exponential, Lag, Stationary, Death
Stationary, Lag, Exponential, Death
Lag, Exponential, Stationary, Death
None of the above
8)
The growth rate constant of an exponentially growing population of bacteria is calculated by
generation time divided by ln2
generation time divided by Nt
ln2 divided by the generation time
None of the above
9)
When measuring concentrations using spectrophotometry, the amount of light absorbed is inversely proportional to the concentration of light-absorbing material in the cuvette.
False
True
10)
The generation time of Staphylococcus aureus is
30 seconds
20 minutes
30 minutes
25 minutes
11)
A culture of bacteria produces 5 generations in 2 hours. Calculate the generation time of the bacterium.
24 minutes
20 minutes
30 seconds
1 hour
12)
Starvation proteins are produced during the ............. phase of growth curve
Stationary phase
Exponential phase
Lag phase
Death phase
Cite this Simulator:
vlab.amrita.edu,. (2011). Bacterial Growth Curve. Retrieved 17 February 2025, from vlab.amrita.edu/?sub=3&brch=73&sim=1105&cnt=3
.....
.....
.....
Copyright @ 2025 Under the NME ICT initiative of MHRD
Powered by
Amrita
Virtual Lab Collaborative Platform
[ Ver 00.13. ]