Ranking Microbial Products by Human Welfare — NEET Biology

Correct answer: B — A-III, B-IV, C-II, D-V, E-I

Let's match the items from Column I with Column II based on the NCERT text: A. Propionibacterium sharmanii: The NCERT states, 'the large holes in ‘Swiss cheese’ are due to production of a large amount of CO2 by a bacterium named Propionibacterium sharmanii.' So, A matches with III. B. Saccharomyces cerevisiae (Brewer’s Yeast): The NCERT states, 'Saccharomyces cerevisiae... is used for fermenting malted cereals and fruit juices, to produce ethanol.' So, B matches with IV. C. Lactobacillus: The NCERT states, 'Micro-organisms such as Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it to curd.' So, C matches with II. D. Penicillium notatum: The NCERT states, 'He [Fleming] named it Penicillin after the mould Penicillium notatum.' Penicillin was the first antibiotic. So, D matches with V. E. Trichoderma polysporum: The NCERT states, 'Another bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum.' So, E matches with I. Combining these matches, the correct sequence is A-III, B-IV, C-II, D-V, E-I. Therefore, option B is the correct answer.