neet exam

Which of the following changes occurs during the processing of proinsulin into mature insulin? (A) B-peptide is added to proinsulin. (B) C-peptide is removed from proinsulin. (C) C-peptide is added to proinsulin (D) A-peptide is removed from proinsulin.

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In rDNA technology, the selection of white colonies of bacteria in the presence of chromogenic substrate is possible because of (A) insertional inactivation of B-galactosidase in recombinant bacteria (B) presence of the ß-galactosidase gene in recombinant bacteria (C) insertional inactivation of B-galactosidase in non-recombinant bacteria (D) inactivation of glycosidase enzyme in recombinant bacteria

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Infection by pathogens can be detected by which of the following biomolecule(s)? (A) Glycoproteins (B) Proteins (C) Nucleic acid (D) All of the above

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What is the advantage of stirred-tank bioreactors? (A) It purifies the product (B) It ensures anaerobic conditions in the culture vessel (C) It ensures availability of oxygen throughout the process (D) All of the above

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