Microbial Growth Kinetics MCQ's (Batch culture, Fed-batch culture and Continuous culture)

 Hello friends, I am Laxman Sonale, In today's article we see the MCQs on Microbial Growth and it's Kinetics in different three cultures, like Fed-batch, Batch and continuous culture.

so let's see 

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Microbial Growth Kinetics MCQ's:

1. 1)The Batch culture is a/an ______ culture system.
   a) Open
   b) Closed
   c) Isolated
   d) Semi-closed

   2.       A period during which the growth rate of cells gradually increases is known as _____
   a) Lag phase
   b) Log phase
   c) Stationary phase
   d) Deceleration phase

   3.      During batch culture/fermentation, nutrients in the fermenter are utilized at a fast rate.
   a) True
   b) False

   4.      The exponential phase may be described by the equation _______
   a) dx/dt = µx
   b) dt/dx = µ
   c) dx/dt = µt
   d) dx²/dt² = µ

   5.      During batch fermentation, in which phase the microbes in the fermenter are adapting to the new environment?
   a) Lag phase
   b) Log or exponential phase
   c) Stationary phase
   d) Death phase

   6.      Who first suggested that filamentous fungi have a ‘growth unit’ which is replicated at a constant rate?
   a) Trinci
   b) Petersen
   c) Plomley
   d) Griffiths

   7.      Which of the following organisms represent the highest specific growth rate, µ_max?
   a) Vibrio natriegens
   b) Methylomonas methanolytica
   c) Aspergillus nidulans
   d) Penicillium chrysogenum

   8.      The size of fermenters is usually large in batch fermentation.
   a) True
   b) False

   9.       The Yield factor (Y) is the measure of the efficiency of _______
   a) Conversion of anyone substrate into biomass
   b) Conversion of all the substrates into biomass
   c) The Affinity of an enzyme to the substrate
   d) Number of microbes which produced the biomass

   10.  The Yield Factor (Y) does not vary upon which of the following?
   a) pH
   b) Growth rate
   c) Temperature
   d) Amount of enzyme

   11.   Which scientist(s) pointed out that the stationary phase is a misnomer in terms of the physiology of organism?
   a) Burrow et al.
   b) Bu’Lock et al.
   c) Bull
   d) Monod

   12.  What is Idiophase?
   a) Production of secondary metabolites
   b) Production of primary metabolites
   c) Production of tertiary metabolites
   d) Production of quaternary metabolites

   13.   Borrow et al. investigated the biosynthesis of Gibberellic acid by Gibberella fujikuroi and divided growth of organisms into balanced, storage and maintenance phase. What do you mean by storage phase?
   a) The phase equivalent to the early to middle exponential phase
   b) The phase equivalent to the late exponential phase
   c) The phase equivalent to the stationary phase
   d) The phase equivalent to the lag phase

   14.  The batch culture or fermentation can be used to produce ________
   a) Organic acids
   b) Amino acids
   c) Single Cell Protein
   d) Antibiotics

   15.  The Continuous culture is a/an ______ culture system.
   a) Open
   b) Closed
   c) Isolated
   d) Semi-closed

   16.   During continuous culture/fermentation, nutrients in the fermenter are utilized at a fast rate.
   a) True
   b) False

   17.  Which Growth phase is usually longer in continuous culture?
   a) Log
   b) Exponential
   c) Stationary
   d) Death

   18.  What is the dilution rate (D)?
   a) D = F/V
   b) D = V/F
   c) D = µF
   d) D = µD

   19.  What is the unit of flow rate (F)?
   a) dm³ h^-1
   b) km³ h^-1
   c) ml³ h^-2
   d) dm² h^-2

   20.  The chemostat and turbidostat are the types of bioreactors that are used in which of the following culture?
   a) Batch culture
   b) Continuous culture
   c) Fed-Batch culture
   d) Solid State culture

   21.  Which scientist(s) gave a full kinetic description of external and internal feedback system?
   a) Monod
   b) Pirt
   c) Bull
   d) Harte and Webb

   22.  What are the disadvantages of continuous culture?
   a) It can rarely be used for other productions
   b) The growth rate is higher
   c) If contamination occurs, huge volumes of the product may be lost
   d) It is very useful for processes involving the production of primary metabolites

   23.   In continuous culture, the turnover rate is high.
   a) True
   b) False

   24.   Which of the following is not the type of continuous brewing?
   a) Cascade system
   b) Multistage system
   c) Tower system
   d) Extract brewing

   25.   All the constituents of medium are excess in _______
   a) Chemostat
   b) Turbidostat
   c) Batch culture
   d) Fed-Batch culture

   26.  Which carbon source has great application for SCP production?
   a) Cellulose
   b) Starch
   c) Methanol
   d) Methane

   27.  The continuous culture or fermentation can be used to produce _______
   a) Biomass
   b) Primary metabolites
   c) Secondary metabolites
   d) Antibodies

   28.  Which of the following is NOT correct for Continuous fermentation?
   a) Setup is not changed from outside once the fermentation has started
   b) Nutrients are added many times
   c) Closer to the natural environment
   d) The small size of fermenters are required

   29.   The Fed-batch culture is a/an ______ culture system.
   a) Open
   b) Closed
   c) Isolated
   d) Semi-closed

   30.  Who introduced the term “Fed-Batch”?
   a) Burrow et al.
   b) Bu’Lock et al.
   c) Yoshida et al.
   d) Maniatis et al.

   31.  Which of the following is a type of Fed-Batch culture?
   a) Variable volume
   b) External Feedback
   c) Internal Feedback
   d) Chemostat

   32.  Which scientist(s) described the kinetics of variable-volume fed-batch culture?
   a) Dunn and Mor
   b) Maniatis et al.
   c) Van’t Hoff
   d) Maxwell

   33.  What happens in a Quasi-Steady state?
   a) Specific growth increases
   b) Specific growth decreases
   c) Specific growth becomes constant
   d) Specific growth becomes zero

   34.  What is the condition for a Quasi-Steady state?
   a) µ = 0
   b) µ = D
   c) D = F
   d) µ = F

   35.  In Variable-volume fed-batch culture, the broth volume remains almost the constant.
   a) True
   b) False

   36.  Which of the following does not include in the range of fermentation processes?
   a) Microbial Enzymes
   b) Microbial metabolites
   c) Biotransformation
   d) Recombinant DNA

   37.  Which of the following was used in the production of bakers’ yeast?
   a) Batch culture
   b) Continuous culture
   c) Fed-Batch culture
   d) Solid state culture

   38.  Which of the following is correct with respect to Fermentation?
   a) A process involving the mass culture of micro-organisms
   b) It is a fast process
   c) Fermented food products are always healthy
   d) Oxygen is produced during fermentation

   39.   In fixed-volume fed-batch culture, volume changes with fermentation time due to the substrate feed.
   a) True
   b) False

   40.   Who developed a method for the optimization of the fed-batch system?
   a) Shioya
   b) Queener
   c) Swartz
   d) Waki

   41.   Cyclic Fed-Batch culture has been used for the production of _______
   a) Bovine serum albumin
   b) Penicillin
   c) Human serum albumin
   d) Cheese Production

   42.   What is the unit of substrate feed rate (G)?
   a) dm³
   b) dm³ h^-1
   c) g dm^-3 h^-1
   d) g dm³

   43.  The feed solution in fed-batch culture is highly concentrated to _______
   a) avoid dilution of the bioreactor
   b) maintain low cell density in bioreactor
   c) avoid lag phase
   d) increase productivity