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The biomass concentration is at the highest level in which phase?

(a) Lag phase

(b) Log phase

(c) Exponential phase

(d) Stationary phase

The question was asked in examination.

Query is from Kinetics of Cell Substrate Uptake in Cell Culture topic in division Homogenous Reactions of Bioprocess Engineering

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Correct option is (c) Exponential phase

Explanation: The biomass concentration at the end of the exponential phase is at its highest level. Therefore the decline in substrate concentration will be very rapid so that the time period during which the substrate concentration is close to Ks is very short.

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