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Biology · MICROBES IN HUMAN WELFARE

हिन्दी

Consider the following statements about microbes in household products: (A) Curd contains millions of lactic acid bacteria (LAB) which improve nutritional quality by increasing vitamin B12. (B) The puffed-up appearance of dough for dosa and idli is due to carbon dioxide production. (C) Swiss cheese has large holes due to production of \( \text{CO}_2 \) by Propionibacterium sharmanii. (D) Toddy is made by fermenting sap from palms. How many of the above statements are correct?

  1. Only two
  2. All four
  3. Only three
  4. None

Correct answer · Option 2

All four

Explanation

All four statements (A, B, C, D) are factually correct statements from NCERT chapter 8.

Related questions

Given below are two statements: Statement I: Alexander Fleming, Ernst Chain and Howard Florey were awarded the Nobel Prize in 1945 for the discovery and potential establishment of Penicillin as an effective antibiotic. Statement II: Streptokinase is used as a clot buster because of its immunosuppressive action in organ-transplant patients. In the light of the above statements, choose the most appropriate answer from the options given below:→Which bioactive molecule is commercially used as an immunosuppressive agent in organ-transplant patients?→Which microbial enzyme is used in detergent formulations and is helpful in removing oily stains from laundry?→Consider the following statements regarding secondary sewage treatment and sludge processing: (A) The effluent is passed into aeration tanks where growth of aerobic microbes forms flocs. (B) The BOD of sewage is significantly reduced during the aeration tank process. (C) A small part of the activated sludge is pumped back into the aeration tank to serve as inoculum. (D) Anaerobic sludge digesters produce gases such as methane, hydrogen sulphide and carbon dioxide. How many of the above statements are correct?→
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