Virtual Labs

Arrange the growth processes in the order they occur during a fed-batch operation: (i) lag phase, (ii) death phase, (iii) deceleration phase, (iv) stationary phase, (v) exponential growth phase:

a: (i), (ii), (iii), (iv), (v) Explanation

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b: (i), (iv), (iii), (ii), (v) Explanation

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c: (iii), (i), (iv), (v), (ii) Explanation

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d: (i), (v), (iii), (iv), (ii) Explanation

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Name the phase which is a period of adaptation of the cells to the new environment :

a: Deceleration phase Explanation

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b: Stationary Phase Explanation

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c: Lag Phase Explanation

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d: Exponential Growth Phase Explanation

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What can result in starting of the Deceleration Phase during a fed-batch operation? (i) Substantial depletion of one or more essential nutrients. (ii)Accumulation of toxic by-products.

a: Only (i) alone Explanation

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b: Only (ii) alone Explanation

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c: Both (i) and (ii) Explanation

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d: Neither (i) nor (ii) Explanation

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Which condition marks the beginning of stationary phase?

a: Growth rate of cells becomes negative Explanation

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b: Growth rate of cells becomes positive Explanation

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c: The net growth rate of cells becomes zero Explanation

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d: None of the above Explanation

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