Some important events in the history of life on Earth are given below.

A. First dinosaurs appeared.

B. First reptiles appeared.

C. First insect fossils appeared.

D. First toothed birds appearance.

E. First wingless insect appeared.

F. Mammals like reptile arise

Match the above with the geological time periods and choose the correct combination,

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#Question id: 21501

#Unit 12. Biochemical Engineering

A fermenter produces 100 kg lysine per day. If the volumetric productivity is 0.8 gl^-1h^-1, what is the volume of the fermenter in liter?

TLS Online TPP Program

#Question id: 21053

#Unit 12. Biochemical Engineering

In a fermentor the impeller diameter is increased from 0.5 m to 1 m and the rpm is increased from 100 rpm to 400 rpm. Reynolds number will increase by?

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#Question id: 21058

#Unit 12. Biochemical Engineering

Pseudomonas with the elemental composition of CH3O0.5N0.5 (MW = 30) is grown in a bioreactor to a final cell mass of 30 g/l. The minimum concentration (g/l) of ammonia (NH3) (MW = 17) (as the sole nitrogen source) required is:

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#Question id: 21060

#Unit 12. Biochemical Engineering

Acetobacter aceti converts alcohol to acetic acid according to the stoichiometric relation

C2H5OH + O2  → CH3COOH + H2O

In a vigorously agitated and aerated reactor containing 20 g/l ethanol, the organism produces 16 g/l acetic acid and 2 g/l was the residual ethanol concentration. What are the theoretical and observed yields of acetic acid expressed in g/g ethanol?

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#Question id: 21061

#Unit 12. Biochemical Engineering

A continuous stirred tank bioreactor produces 48 kg lysine.day^-1. If the volumetric productivity is 2 g.l^-1.h^-1, the volume of the reactor is:

TLS Online TPP Program

#Question id: 21063

#Unit 12. Biochemical Engineering

To have an overall yield of greater than 50% in a three step purification process for a food additive, the minimum average step yield(%) necessary would be around: