TLS Online TPP Program

#Question id: 341


 Which force can stabilize a DNA double-helix?

#Section 2: General Biology
  1. Hydrophobic bases are found in the interior of the helix where each base-pair is stabilized by the same number of hydrogen bonds.

  2. Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.

  3. Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.

  4. Covalent base-stacking interactions can occur between adjacent bases within the same strand in the helix.

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TLS Online TPP Program

#Question id: 14183

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of benzoic acid by a mixed culture of microorganisms can be represented by the following reaction.

C6H5COOH + a O2 + b NH3 → c C5H7NO2 + d H2O + e CO2

(substrate)                                  (bacteria)


 Determine degree of reduction for the substrate.

TLS Online TPP Program

#Question id: 14184

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of benzoic acid by a mixed culture of microorganisms can be represented by the following reaction.

C6H5COOH + a O2 + b NH3 → c C5H7NO2 + d H2O + e CO2

(substrate)                                  (bacteria)

 Determine degree of reduction for bacteria.

TLS Online TPP Program

#Question id: 14185

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

                Determine a, b, c, d, and e, if YX/S = 0.4 g X/g S.

___________________

TLS Online TPP Program

#Question id: 14186

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

                Determine the yield coefficients YX/O2

           ________________

TLS Online TPP Program

#Question id: 14187

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

                Determine the yield coefficient YX/NH3.