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This quiz contains multiple-choice problems on batch culture, continuous and fed-batch culture.
During batch fermentation, in which phase the microbes in the fermenter are adapting to the new environment?
Who first suggested that filamentous fungi have a ‘growth unit’ which is replicated at a constant rate?
Which of the following organisms represent the highest specific growth rate, µmax?
Which scientist(s) pointed out that the stationary phase is a misnomer in terms of the physiology of organism?
The Batch culture is a/an __ culture system.
Open
Closed
Isolated
Semi-closed
A period during which the growth rate of cells gradually increases is known as
Lag phase
Log phase
Stationary phase
Deceleration phase
During Batch culture/fermentation, nutrients in the fermenter are utilized at a fast rate. True or false?
True
False
The size of fermenters is usually large in Batch fermentation. True or false?
True
False
The yield factor (Y) is the measure of the efficiency of
The conversion of anyone substrate into biomass
The conversion of all the substrates into biomass
The affinity of an enzyme to the substrate
The number of microbes which produced the biomass
The yield factor (Y) does not vary upon which of the following?
pH
Growth rate
Temperature
Amount of enzyme
Borrow et al. investigated the biosynthesis of gibberellic acid by gibberella fujikuroi and divided growth of organisms into balanced, storage and maintenance phases. What do you mean by storage phase?
The phase equivalent to the early to middle exponential phase
The phase equivalent to the late exponential phase
The phase equivalent to the stationary phase
The phase equivalent to the lag phase
What is idiophase?
Production of secondary metabolites
Production of primary metabolites
Production of tertiary metabolites
Production of quaternary metabolites
The batch culture or fermentation can be used to produce
Organic acids
Amino acids
Single cell protein
Antibiotics
The fed-batch culture is a/an __ culture system.
Open
Closed
Isolated
Semi-closed
The exponential phase is described by the equation
dx/dt = µx
dt/dx = µ
dx/dt = µt
dx^2/dt^2 = µ
