#Question id: 14300
#SCPH05 I Biotechnology
A 15-m 3 chemostat is operated with dilution rate 0.1 h-1. A continuous steriliser with steam injection and flash cooling delivers sterilized medium to the fermenter. Medium in the holding section of the steriliser is maintained at 130⁰C The concentration of contaminants in the raw medium is 105 ml-l; an acceptable contamination risk is one organism every 3 months. The Arrhenius constant and activation energy for thermal death are estimated to be 7.5 × 1039 h-1 and 288.5 kJ gmol- 1, respectively. The steriliser pipe inner diameter is 12 cm. At 130⁰C the liquid density is 1000 kg m- 3 and the viscosity is 4 kg m- 1 h- 1. Assuming perfect plug flow, determine the length of the holding section. __________________
#Question id: 1091
#SCPH01 Biochemistry
Why does testosterone, a lipid-soluble signaling molecule that crosses the membranes of all cells, affect only target cells?
#Question id: 4167
#SCPH28 | Zoology
Which statement is false concerning ribosomes and their components?
#Question id: 8705
#SCPH05 I Biotechnology
If you were using cladistics to build a phylogenetic tree of cats, which of the following would be the best outgroup?
#Question id: 959
#SCPH05 I Biotechnology
Phenylalanine hydroxylase requires molecular ________ and tetrahydrobiopterin.