Maximum size of foreign DNA that can be inserted into a replacement vector is A. 25-30 kb B. 18-20 kb C. 20-25 kb D. 40-50 kb View Answer Workspace Report Discuss in Forum Which of the following is not true about phagemid? A. Contain functional origin of replication of the plasmid and λ phage B. May be propagated as a plasmid or as phage in appropriate strain C. Contain λ att site D. Can only be propagated as phage View Answer Workspace Report Discuss in Forum pBR 322 has/have which of the following selection marker(s)? A. Ampr B. Tetr C. Both (a) and (b) D. Kanr....

Vegetable oil, (corn oil or soybean oil) added in the fermentation medium for penicillin, act as A. source of nutrients B. carbon source C. antifoam agent D. both (a) and (c).... Which of the following changes occur during first phase of growth of Penicillium chrysogenum? A. Growth of mycelia occurs B. Ammonia is liberated in the medium C. Lactic acid present in the corn steep liquor is utilized at the maximum rate D. All of the above.... Antibiotics are typically produced in fed batch reactors because A. antibiotic yields are generally higher when cells enter the stationary phase B. the precursors are often toxic to the cells C. antibiotic yields are generally higher when cell growth slows D. All of the above.....

Media composition for the production of streptomycin is A. soybean meal, glucose, peptone, malt extract, sodium chloride B. soybean meal, glucose, peptone, malt extract, ammonium chloride C. soybean meal, glucose, peptone, malt extract, calcium carbonate D. soybean meal, glucose, peptone, malt extract, ammonium sulphate.... Which of the following organism(s) produce(s) tetracycline? A. Steptomyces aureofaciens B. Steptomyces ramosus C. Nocardia sulphurea D. All of these View Answer Workspace Report Discuss in Forum Media used for the production of chlorotetracyclin consists of A. sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl B. corn steep liquor, CaCO3 and (NH4)2SO4 C. sugar, CaCO3 and (NH4)2SO4 D. corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl.....

The crushed grapes are known as A. malt B. must C. wort D. sonti.... The yield of the antibiotic depends upon A. pH of the medium B. age of the inoculum C. composition of the medium D. all of these View Answer Workspace Report Discuss in Forum During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place A. during the first phase B. during the second phase C. during the third phase D. same in all the phases View Answer Workspace Report Discuss in Forum Fermentation medium for oxytetracyclin (terramycin) consist of....

The organism used for the preparation of sake is A. Rhizopus sonti B. Aspergillus oryzae C. Lactobacillus vermiformis D. Saccharomyces pyriformis View Answer Workspace Report Discuss in Forum The organism used for the preparation of sonti is A. Rhizopus sonti B. Aspergillus oryzae C. Lactobacillus vermiformis D. Saccharomyces pyriformis View Answer Workspace Report Discuss in Forum Sonti is A. rice beer or wine of India B. wheat beer or wine C. barley beer or wine D. rice beer or wine of Japan....

Sodium or potassium meta bi sulphate is added to crushed grapes to A. enhance the flavouring compound B. check the undesirable organisms C. maintain pH D. all of the above View Answer Workspace Report Discuss in Forum A hydrometer A. measures wine acid B. requires a few drops of juice C. measures alcohol in the wine D. measures grape sugar View Answer Workspace Report Discuss in Forum Punching down is done A. for the same reasons as pumping over B. to extract tannin C. both (a) and (b) D. to keep the cap dry....

Wort is A. an aqueous extract of malt B. malted barley C. coagulated protein obtained during boiling D. none of the above Which is not correct about blush wines? A. They are stored in barrels B. They are bottled within a year C. They are usually slightly sweet D. They are fermented in stainless steel Malting process allows malt amylase and proteinases to degrade starch and protein to A. glucose and peptone as well as peptides B. glucose and amino acids C. maltose and peptone as well as peptides D. maltose and amino acids....

The term Racking refers to A. stacking unlabeled wine in bins for aging B. adding yeast to initiate fermentation C. storing hoses to drain on a slanted board D. removing clear liquid from sediment View Answer Workspace Report Discuss in Forum The process of making malt as soluble as possible by using enzymes adjuncts etc is known as A. brewing B. malting C. mashing D. pitching View Answer Workspace Report Discuss in Forum Chaptalization is A. adding sucrose to must B. adding grape juice to must C. adding sugar to wine before bottling D. adding grape juice to wine before bottling....

Which of the following is correct? A. rabbits do not make myelomas whereas mice are unable to synthesize antibodies B. rabbits do not make myelomas whereas mice are able to synthesize antibodies C. rabbits make myelomas whereas mice are unable to synthesize antibodies D. rabbits make myelomas whereas mice are able to synthesize antibodies... The Ig locus is about A. 2/3rd of all hybridomas B. l/3rd of all hybridomas C. l/2nd of all hybridomas D. 1/4th of all hybridomas... Which type of cell actually secrets antibodies? A. plasma cells B. T cells C. macrophages D. dendritic cells....

It is highly valued if the lymphocytes derived from the lymph node or tonsil tend to undergo fusion at A. high frequencies B. moderate frequencies C. low frequencies D. at no frequency..... Small simple molecules are A. poor antigens B. rich antigens C. moderate antigens D. heterophilic antigens View Answer Workspace Report Discuss in Forum The EBV-hybridoma technique A. immortalizes the donor Bcells B. facilitates the proliferation of antigen specific B cells C. gives much higher hybridization frequencies D. all of the above View Answer Workspace Report Discuss in Forum Helper T cells assist in the functions of A. certain B cells....