Home⇒ Medical Science⇒ Bochemical Engineering⇒ Fermentation reactors
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ In batch culture, protogon is produced from peptone during the stationary phase with a yield of 0.4 protogon mg per g of peptone. If it is to be produced in a chemostat at a dilution rate of 0.5 h-1 from a medium containing 10 g.l-1 of peptone, then the rate of protogon synthesis would be 0 g.l-1h-1 [other wrong options] [Discuss in forum] |
| Q2 ⇒ A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be 2 h [other wrong options] [Discuss in forum] |
| Q3 ⇒ In fed-batch fermentation, mass of substrate utilized is calculated using the relationship initial mass of substrate in the reactor - final mass of substrate in the reactor + flow rate x [substrate in the feed] [other wrong options] [Discuss in forum] |
| Q4 ⇒ Mixing profiles closest to plug flow are observed in continuous packed bed reactor [other wrong options] [Discuss in forum] |
| Q5 ⇒ Yeast is typically produced in fed batch reactors because yeast cells respire at low glucose concentrations [other wrong options] [Discuss in forum] |
| Q6 ⇒ The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent? Approximately 20 g dry weight per litre [other wrong options] [Discuss in forum] |
| Q7 ⇒ Saccharomyces cerevisiae when grown in high glucose concentration medium, the cells activity depends on which of the following? No effect of dissolved oxygen [other wrong options] [Discuss in forum] |
| Q8 ⇒ The continuous cultures are not widely used in industry because all of the above [other wrong options] [Discuss in forum] |
| Q9 ⇒ For organisms growing in a chemostat, the specific growth rate can be determined from the dilution rate [other wrong options] [Discuss in forum] |
| Q10 ⇒ Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following? ATP is diverted away from anabolism to homeostasis [other wrong options] [Discuss in forum] |
| Q11 ⇒ The main reason for production of antibiotics in fed batch reactors is all of the above [other wrong options] [Discuss in forum] |
| Q12 ⇒ Saccharomyces cerevisiae produces high biomass yields at low glucose concentrations and high dissolved oxygen concentrations. Which of the following should be followed for maximizing its biomass productivity? Fed batch fermenter [other wrong options] [Discuss in forum] |
| Q13 ⇒ A strain of Escherichia coli has a maximum specific growth rate of 0.8 h-1 on a glucose based medium. If this organism is being grown in a chemostat with a dilution rate of 1.2 h-1, then at steady state the concentration of E. coli in the same medium will be zero [other wrong options] [Discuss in forum] |
| Q14 ⇒ Monoclonal antibodies are typically produced in fed batch reactors because hybridoma cells yield higher lactate at high glucose concentrations [other wrong options] [Discuss in forum] |
| Q15 ⇒ When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as growth associated [other wrong options] [Discuss in forum] |
| Q16 ⇒ The lowest biomass yield in a culture of Escherichia coli will be in an aerated batch culture containing a initial high concentration of glucose [other wrong options] [Discuss in forum] |
| Q17 ⇒ Which of the statement is true for continuous reactor at steady state? Biomass, substrate and product concentrations do not change with time [other wrong options] [Discuss in forum] |
| Q18 ⇒ In a continuous reactor, the medium contains 40 g.l-1 of maltose and the medium flow rate is 10 litres per hour and the effluent contains 20 g.l-l of lactate. What is the productivity of lactate production from this reactor? 200 g lactate.l-1 [other wrong options] [Discuss in forum] |
| Q19 ⇒ A continuous reactor at steady state contains 0.04 g.l-1 of biomass and 0.02 g.l-1 of phenol. The feed contained 0.1 g.l-1 of phenol. The biomass yield would be 0.5 g.g-1 [other wrong options] [Discuss in forum] |
| Q20 ⇒ A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic will be zero [other wrong options] [Discuss in forum] |
| Or |