TLS Online TPP Program

#Question id: 190


Ca++ or Mg++ are most likely to be part of ________, while Zn++ or Fe++ are present in ________.

#Section 2: General Biology
  1. metal-activated enzymes; metalloenzymes

  2. metalloenzymes; metal-activated enzymes

  3. cofactors; coenzymes

  4. coenzymes; cofactors

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TLS Online TPP Program

#Question id: 14166

#Section 5: Bioprocess Engineering and Process Biotechnology

Stoichiometric equations are used to represent growth of microorganisms provided a ' molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C4.4H7.30 1.2N0.86 . These bacteria are grown under aerobic conditions with hexadecane (C16H34) as substrate. The reaction equation describing growth is:

                             

You have been put in charge of a small fermenter for growing the bacteria and aim to produce 2.5 kg of cells for inoculation of a pilot-scale reactor. What minimum amount of hexadecane substrate must be contained in your culture medium? 

TLS Online TPP Program

#Question id: 1673

#Section 2: General Biology

N-region insertion is associated with the expression of:

TLS Online TPP Program

#Question id: 230

#Section 2: General Biology

Vitamin D helps control the utilization of which ion?

TLS Online TPP Program

#Question id: 2062

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following types of molecules lack hydrophilic domains?

TLS Online TPP Program

#Question id: 14265

#Section 5: Bioprocess Engineering and Process Biotechnology

For the activated-sludge, the specific growth rate of cells is given by 


 

The following parameter values are known: F = 500 l/h, α = 0.4, ɣ = 0.1, Xe = 0, V = 1500 l, Ks = 10 mg/l, µm = 1 h-1 , kd = 0.05 h-1 , S0 = 1000 mg/l, Y M X/S = 0.5 g dw/g substrate. Calculate the substrate concentration (S) in the reactor at steady state. -------------------------