A 200-1itre stirred fermenter contains a batch culture of Bacillus subtilis bacteria at 28⁰C Air at 20⁰C is pumped into the vessel at a rate of 1 vvm; (vvm stands for volume of gas per volume of liquid per minute). The average pressure in the fermenter is 1 atm. The volumetric flow rate of off-gas from the fermenter is measured as 189 l min^-1. The exit gas stream is analysed for oxygen and is found to contain 20.1% 0₂. The dissolved-oxygen concentration in the broth is measured using an oxygen electrode as 52% air saturation. The solubility of oxygen in the fermentation broth at 28⁰C and 1 atm air pressure is 7.8 x 10^-3 kg m^-3. Calculate the oxygen transfer rate_____________

TLS Online TPP Program

#Question id: 3280

#Section 3: Genetics, Cellular and Molecular Biology

Small populations are threatened by the loss of genetic diversity from

a. Inbreeding

b. Genetic drift

c. Limited mating

TLS Online TPP Program

#Question id: 14893

#Section 5: Bioprocess Engineering and Process Biotechnology

An open system in which the growth rate is maintained by the removal and addition of media at such a rate as to maintain a constant cell density is called a 

TLS Online TPP Program

#Question id: 1633

#Section 2: General Biology

Immunological memory can be transferred experimentally by:

TLS Online TPP Program

#Question id: 221

#Section 2: General Biology

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

TLS Online TPP Program

#Question id: 3585

#Section 3: Genetics, Cellular and Molecular Biology

Tryhybrid cross allowed between AaBbCc X AaBbCc, what is the proportional of following genotype, If all character follow independent assortment?

AaBbCc, Aabbcc, AabbCc, AABBcc, AABbCC    respectively

1.      8/64        2/64      4/64          1/64     2/64

2.       6/64        1/64      2/64          1/64     1/64

3.       6/64        2/64      4/64          1/64     2/64

4.         0            2/64      4/64          1/64         0