Phenylketonuria (PKU) is a disease caused by a defect in ________ formation.

#Question id: 14661

#I Life Science/ Life Sciences Group – I-V

#Question id: 581

#I Life Science/ Life Sciences Group – I-V

The main difference between chemical and enzyme kinetics is that

#Question id: 15897

#SCPH05 I Biotechnology

#Question id: 281

#SCPH12 I Genetics

Histones associate with DNA primarily through ________.

#Question id: 14273

#SCPH05 I Biotechnology

Nicotiana tabacum cells are cultured to high density for production of polysaccharide gum. The reactor used is a stirred tank, containing initially 100 litres medium. The maximum specific growth rate of the culture is 0.18 d^-1 and the yield of biomass from substrate is 0.5 g g^-l. The concentration of growth-limiting substrate in the medium is 3% (w/v). The reactor is inoculated with 1.5 g l^{- 1} cells and operated in batch until the substrate is virtually exhausted; medium flow is then started at a rate of 4 l d^-1. Fed-batch operation occurs under quasi-steady-state conditions. Estimate the batch culture time.                                  ____________________