TLS Online TPP Program
More Questions
TLS Online TPP Program
#Question id: 27249
#Section 3: Genetics, Cellular and Molecular Biology
DNA tertiary structure, what is a histone octamer?
TLS Online TPP Program
#Question id: 3040
#Section 2: General Biology
Which of the following is electron source for lithotrophs microorganisms?
TLS Online TPP Program
#Question id: 14366
#Section 5: Bioprocess Engineering and Process Biotechnology
0.1 mg of a quaternary structured enzyme (Mr 486 000) with four active sites converts 48 mirormol substrate/10 sec. Calculate molecular activity (min^-1), catalytic centre activity (min^-1). -
TLS Online TPP Program
#Question id: 3753
#Section 3: Genetics, Cellular and Molecular Biology
Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
TLS Online TPP Program
#Question id: 14249
#Section 5: Bioprocess Engineering and Process Biotechnology
Aspartase enzyme is used industrially for manufacture of aspartic acid, a component of low-calorie sweetener. Fumaric acid and ammonia are converted to aspartic acid according to the equation:
Under investigation is a process using aspartase in intact Bacillus cadaveris cells. In the substrate range of interest, the conversion can be described using Michaelis-Menten kinetics with K m 4.0 gl-1. The substrate solution contains 15% (w/v) ammonium fumarate; enzyme is added in the form of lyophilised cells and the reaction stopped when 85% of the substrate is converted. At 32⁰C vmax for the enzyme is 5.9 g l-1h-1 and its half-life is 10.5 d. At 37⁰C Vmax increases to 8.5 g l- 1 h- I but the half-life is reduced to 2.3 d. The average downtime between batch reactions is 28 h. calculate the reactor volume required to produce 5000 tonnes of aspartic acid per year