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Doctors Medicines MCQs Q&A

Which of the following statements is always correct about an ideal chemostat?
P. Substrate concentration inside the chemostat is equal to that in the exit stream.
Q. Optimal dilution rate is lower than critical dilution rate.
R. Biomass concentration increases with increase in dilution rate.
S. Cell recirculation facilitates operation beyond critical dilution rate.

Which of the following statements is always correct about an ideal chemostat?
P. Substrate concentration inside the chemostat is equal to that in the exit stream.
Q. Optimal dilution rate is lower than critical dilution rate.
R. Biomass concentration increases with increase in dilution rate.
S. Cell recirculation facilitates operation beyond critical dilution rate. Correct Answer P, Q and S only

Related Questions

In balanced growth phase of a cell,
P. All components of a cell grow at the same rate.
Q. Specific growth determined by cell number or cell mass would be the same.
R. The growth rate is independent of substrate concentration.
S. The growth rate decreases with decreasing substrate concentration.
Consider the growth of a microorganism in batch culture. When the substrate concentration is high, the cell density doubles every 0.75 h, the observed substrate yield coefficient is 0.3 g DCW/g, and substrate consumption is allocated towards biosynthesis (60%), maintenance (10%), as well as product formation (30%). The product formation is strictly growth-associated. The batch reactor is inoculated with 0.01 g DCW/L and 10 g/L substrate. Estimate the maximum cell density (after lag phase).
Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India, In this context, which of the following statements is/are correct? 1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification. 2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only. 3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines. Select the correct answer using the codes given below:
A map shows the elevations of Darjeeling, Gangtok, Kalimpong, Pelling, and Siliguri. Kalimpong is at a lower elevation than Gangtok, Pelling is at a lower elevation than Gangtok. Pelling is at a higher elevation than Siliguri. Darjeeling is at a higher elevation than Gangtok. Which of the following statements can be inferred from the paragraph above? i. Pelling is at a higher elevation than Kalimpong ii. Kalimpong is at a lower elevation than Darjeeling iii. Kalimpong is at a higher elevation than Siliguri iv. Siliguri is at a lower elevation than Gangtok
Consider the following statements regarding the energy from biomass.
1. Biomass is a plant matter produced as a result of photosynthesis and some of it can be burnt to provide heat. For example, wood and agricultural waste.
2. Biomass can also be used for power generation or converted into alcohol (liquid or methane gas) to be used as fuel.
3. Biomass is renewable energy and shall be available as long as plants growon Earth.
Which of the above statement(s) is/are correct?
What is the yield coefficient if the initial substrate concentration is 10 g/l and biomass is 0.1 g/l. The substrate is then consumed and produces 5.3 g/l of biomass?
What is the yield coefficient if the initial substrate concentration is 20 g/l and biomass is 0.2 g/l. The substrate is then consumed and produces 6.0 g/l of biomass?
Which combination of the following statements is correct? The incorporation of reheater in a steam power plant: P: always increases the thermal efficiency of the plant. Q: always increases the dryness fraction of steam at condenser inlet. R:  always increases the mean temperature of heat addition. S:  always increases the specific work output.
Match List I with List II List I List II (A) Greedy Best-First Search (I) Space complexity is O(d) where d = depth of the deepest optimal solution (B) A* (II) Incomplete even if the search space is finite. (C) Recursive Best-First Search (III) Optimal if optimal solution is reachable: otherwise, returns the best reachable optimal solution. (D) SMA* (IV) Computation and space complexity is too high.   Choose the correct answer from the options given below:
Wash out (as defined by D = μmax) of a continuous stirred tank fermenter is characterized by (X = biomass, S = substrate concentration in bioreactor, S0 = substrate concentration in feed, P = product concentration in bioreactor).