Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 8751
TLS Online TPP Program

#Question id: 11969

What is the importance of the mucus that are released by salivary glands?

#Unit 7. System Physiology – Animal
  1. They aid in degradation of triglycerides to fatty acids and monoglycerides.
  2. They are beginning the process of starch digestion.
  3. They are hormonal molecules that stimulate the release of gastric juice by the stomach in anticipation of receipt of the contents of the mouth.
  4. They are glycoproteins that make food slippery enough to slide easily through the esophagus
More Questions
TLS Online TPP Program

#Question id: 21413

#Unit 12. Biochemical Engineering

Aqueous two phase partitioning (ATPS) is used for the recovery of an enzyme from the cell free culture filtrate on addition of PEG2000 and dextran. The mixture separates into two phases with a partition coefficient for the enzyme = 4.2. The maximum possible enzyme recovery, when the volume ratio of the upper to lower phases is 5.0 will be:
TLS Online TPP Program

#Question id: 21414

#Unit 12. Biochemical Engineering

A fermentation medium is being cooled from 700 to 320 in a double pipe heat exchanger. Cooling fluid flowing counter currently with this stream is heated from 200 to 460 . The log mean temperature difference (in0 ) for the two streams is:
TLS Online TPP Program

#Question id: 21619

#Unit 12. Biochemical Engineering

For a microbial culture, if the doubling time is 0.231 h, the specific growth rate (in h-1) will be (assume that the endogenous metabolism is negligible)
TLS Online TPP Program

#Question id: 21634

#Unit 12. Biochemical Engineering

The equation for aerobic production of acetic acid from ethanol is:
CH2OH+O2β†’CH3CO2H+H2O.
(ethanol) (acetic acid)
Acetobacter aceti bacteria are added to vigorously-aerated medium containing 10 g.14 ethanol. After some time, the ethanol concentration is 2 g.-2 and 7.5 g.11 of acetic acid is produced. What is the observed yield (Yoing-) and theoretical yield (Yting-8") of acetic acid from ethanol?
TLS Online TPP Program

#Question id: 21644

#Unit 12. Biochemical Engineering

In an exponentially growing batch culture of Saccharomyces cerevisiae, the cell density is 30 π’ˆπ‘³βˆ’πŸ(𝑫π‘ͺ𝑾), the specific growth rate (𝝁) is 𝟎.πŸ’π’‰βˆ’πŸ and substate uptake rate (𝒒) is πŸπŸ–π’ˆπ‘³βˆ’πŸπ’‰βˆ’πŸ. The cell nyield coefficient 𝒀𝒙/𝒔 will be
TLS Online TPP Program

#Question id: 21671

#Unit 12. Biochemical Engineering

A stirred tank bioreactor of 𝟐.πŸ•π’ŽπŸ‘ is agitated using a Rushton turbine with diameter 0.5 m and stirrer speed of 𝟏 π’”βˆ’πŸ. If the fermentation broth has viscosity and density of πŸπŸŽβˆ’πŸ 𝒑𝒂.𝒔 and πŸπŸŽπŸŽπŸŽπ’Œπ’ˆ.π’Žβˆ’πŸ‘ respectively, the mixing time (in seconds) for the bioreactor will be