Question

Penicillin production occurs in which growth phase?

(a) Lag phase

(b) Log phase

(c) Stationary phase

(d) Death phase

I had been asked this question in an online interview.

The above asked question is from Aerobic Bioprocesses topic in portion Mixed Cultures & Traditional Industrial Bioprocesses of Bioprocess Engineering

Answer 1

Correct choice is (c) Stationary phase

Easiest explanation: Like all antibiotics, Penicillin is a secondary metabolite, so is only produced in the stationary phase as Bacteria produce secondary metabolite such as Antibiotics after the active stage (log phase) of the growth cycle.