Which of the following is incorrect 

a) antiparallel β sheets are frequently found and they are quite more stable because of more no. hydrogen bond presence and linear H bonding pattern.

b) antiparallel β sheets are frequently found and they are quite more stable because of more no. hydrogen bond presence and having distorted H bonding pattern.

c) parallel β sheets are relatively less stable and mostly found in core of protein.

d) parallel β sheets are relatively more stable and mostly found in core of protein.

#Question id: 14334

#Section 5: Bioprocess Engineering and Process Biotechnology

Laboratory-scale fermenters are usually mixed using small stirrers with electric motors rated between 100 and 500 W. One such motor is used to drive a 7cm turbine impeller in a small reactor containing fluid with the properties of water. The stirrer speed is 900 rpm. Estimate the power requirements for this process.

#Question id: 14336

#Section 5: Bioprocess Engineering and Process Biotechnology

A cylindrical stirred bioreactor of diameter and height 2 m has a Rushton turbine one-third the tank diameter in size. The bioreactor contains Newtonian culture broth with the same density as water and with viscosity 4 cP. The tank is now aerated. In the presence of gas bubbles, the approximate relationship between ungassed power number (N_P)₀ and gassed power number (N_P)g is: (N_P)g =0.5 (N_P)₀. What maximum stirrer speed is now possible in the sparged reactor? Estimate the mixing time.

#Question id: 14337

#Section 5: Bioprocess Engineering and Process Biotechnology

#Question id: 14338

#Section 5: Bioprocess Engineering and Process Biotechnology

Quasi steady state condition is 

#Question id: 14339

#Section 5: Bioprocess Engineering and Process Biotechnology

In continuous culture which phase is usually longer?