Question: Toxins accumulated in a reactor can lead to low biomass yields probably due to which of the following? [A]. NAD+ is diverted away from homeostasis to anabolism [B]. ATP is diverted away from homeostasis to anabolism [C]. NAD+ is…

Question: When the product formation is approximately equal to the rate of cell growth, the pattern of product formation is termed as [A]. uncoupled [B]. growth associated [C]. non-growth associated [D]. metabolically uncoupled Answer: Option B Explanation: No answer description…

Question: When a culture of fermenting yeast becomes metabolically uncoupled, ethanol [A]. becomes a secondary metabolite [B]. production becomes growth associated [C]. production becomes non-growth associated [D]. becomes a growth nutrient Answer: Option C Explanation: No answer description available for…

Question: The toxicity of organic acids to cells [A]. enhances as the pH falls [B]. reduces as the pH falls [C]. is not affected by pH [D]. is highest at pH 7.0 Answer: Option A Explanation: No answer description available…

Question: Production of organic acids in batch culture is generally growth associated phase followed by non-growth associated production. The probable reason for this is that [A]. organic acids uncouple catabolism from anabolism [B]. biomass yields increase as the fermentation proceeds…

Question: A microorganism which is subjected to the Crabtree effect is most likely to [A]. ferment in the presence of low concentrations of sugar and dissolved oxygen [B]. respire in the presence of low sugar and high dissolved oxygen concentrations…

Question: Which of the following organisms will continue their metabolism at high substrate concentrations? [A]. Pseudomonas aeruginosa [B]. Saccharomyces cerevisiae [C]. Bacillus subtilis [D]. Escherichia coli Answer: Option A Explanation: No answer description available for this question.

Question: Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because [A]. cells will redirect ATP to anabolism [B]. cells will redirect NAD+ to anabolism [C]. cells will redirect ATP to facilitate the diffusion…

Question: Which of the following is best described as secondary metabolite? [A]. Acetic acid produced from the oxidation of ethanol [B]. Ethanol from the fermentation of glucose [C]. Penicillin [D]. Citric acid from the partial oxidation of glucose Answer: Option…

Question: If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will [A]. always decrease with dilution rate [B]. increase with dilution rate until washout [C]. remain constant irrespective of the dilution rate [D].…