TLS Online TPP Program

#Question id: 3877


Differential RNA processing may result in:

#Section 3: Genetics, Cellular and Molecular Biology
  1. a shift in the ratio of mRNA produced from two adjacent genes.

  2. attachment of the poly(A) tail to the 5' end of an mRNA.

  3. inversion of certain exons in the final mRNA.

  4. the production of two distinct proteins from a single gene.

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TLS Online TPP Program

#Question id: 14396

#Section 5: Bioprocess Engineering and Process Biotechnology

A purified hydrolytic enzyme (Mr 150 000) is available with the description: Gives a Vmax of 3 200 units/mg protein under optimal conditions. How many micromoles of substrate can be hydrolysed by 1 mg of protein in 1 minute  

TLS Online TPP Program

#Question id: 14397

#Section 5: Bioprocess Engineering and Process Biotechnology

A purified hydrolytic enzyme (Mr 150 000) is available with the description: Gives a Vmax of 3 200 units/mg protein under optimal conditions. How many nmol of enzyme are there in 1 mg  

TLS Online TPP Program

#Question id: 14398

#Section 5: Bioprocess Engineering and Process Biotechnology

The internal effectiveness factor is useful because , which statement is not correct 

TLS Online TPP Program

#Question id: 14399

#Section 5: Bioprocess Engineering and Process Biotechnology

 observable Thiele modulus CD decreases when 

TLS Online TPP Program

#Question id: 14400

#Section 5: Bioprocess Engineering and Process Biotechnology

internal mass transfer effects are eliminated when the internal effective ness factor is 

TLS Online TPP Program

#Question id: 14401

#Section 5: Bioprocess Engineering and Process Biotechnology

Denitrifying bacteria are immobilised in gel beads and used in a stirred reactor for removal of nitrate from groundwater. At a nitrate concentration of 3 g m -3, the conversion rate is 0.011 g s-1 m-3 catalyst. The effective diffusivity of nitrate in the gel is 1.5 × 10 -9 m 2 s-1, the beads are 6 mm in diameter, and the liquid-solid mass-transfer coefficient is 10 -5 m s-1. Km for the immobilised bacteria is approximately 25 g m -3. Calculate the observable Thiele modulus with CAs = 1.9 g m -3