Lactobacillus casei is propagated under essentially anaerobic conditions to provide a starter culture for manufacture of Swiss cheese. The culture produces lactic acid as a by-product of energy metabolism. The system has the following characteristics:

                                                                 

 

A stirred fermenter is operated in fed-batch mode at quasisteady state with a feed flow rate of 4 m³ h^-1 and feed substrate concentration of 80 kg m^-3. After 6 h, the liquid volume is 40 m³. What mass of cells is produced after 6 h fed-batch operation?

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#Question id: 10760

#Section 6: Plant, Animal and Microbial Biotechnology

Following are some statements of secondary metabolites of terpenes in plants is incorrect?

#Question id: 10761

#Section 6: Plant, Animal and Microbial Biotechnology

Which one of the following combinations of secondary metabolite biosynthetic pathway found in the biosynthesis of terpenes?

#Question id: 10762

#Section 6: Plant, Animal and Microbial Biotechnology

The following are certain statements about secondary metabolites:

a) They protect plants against being eaten by herbivores and against being infected by microbial pathogens

b) Terpenes, are the class of secondary metabolites are synthesized by methyl erythritol phosphate(MEP) pathway and Mevalonic acid pathway

c) Terpenes, are the class of secondary metabolites are synthesized by methyl erythritol phosphate(MEP) pathway and sikkimic acid pathway

Which one of the following combinations of the above statements is correct?

#Question id: 10763

#Section 6: Plant, Animal and Microbial Biotechnology

In mevalonic acid pathway, three molecules of acetyl-CoA are joined together stepwise to form mevalonic acid, which intermediate steps it will perform to yield isopentenyl diphosphate (IPP2)?

#Question id: 10764

#Section 3: Genetics, Cellular and Molecular Biology

#Question id: 10765

#Section 3: Genetics, Cellular and Molecular Biology