A researcher performed an experiment during vulva formation in C.elegans;

I- In first experiment destroyed anchor cell 

II- In second experiment destroyed three central VPCs 

What kind of conclusion has been drawn by these experiments?

a) I-Three cells out of six of the equivalence group divide once and contribute to the vulva formation

b) I-all six cells of the equivalence group divide once and contribute to the hypodermal tissue

c) II-three outer cells, which normally form hypodermis, generate vulval cells instead

d) II-three remaining cells normally formed hypodermis as usually

TLS Online TPP Program

#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?

TLS Online TPP Program

#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:

TLS Online TPP Program

#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?

TLS Online TPP Program

#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: