Question 1

What is the reason behind production of large holes in 'Swiss Cheese' ?

Accepted Answer

The large holes in 'Swiss cheese' are due to the production of a large amount of CO _2 by a bacterium named Propionibacterium sharmanii. Answer: The production of large amount of CO _2 by Propionibacterium sharmanii

Question 2

Match List I with List II : List I (Bioactive molecules) List II (Importance) A. Streptokinase I. Immunosuppressive agent B. Statins II. Removal of clots from the blood vessels C. Lipases III. Blood c

Accepted Answer

Streptokinase is produced by the bacterium Streptococcus and is used as a clot buster for removing clots from the blood vessels. Thus, A matches with II. Statins are produced by the yeast Monascus purpureus and act as blood cholesterol-lowering agents. Thus, B matches with III. Lipases are used in detergent formulations and help in removing oily stains from laundry. Thus, C matches with IV. Cyclosporin A is produced by the fungus Trichoderma polysporum and is used as an immunosuppressive agent i

Question 3

Which of the following is used as a clot buster ?

Accepted Answer

Streptokinase is an enzyme produced by the bacterium Streptococcus and modified by genetic engineering. It is used as a clot buster for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack. Statins are used as blood cholesterol-lowering agents. Penicillin is an antibiotic used to treat bacterial infections. Cyclosporin A is used as an immunosuppressive agent in organ transplant patients. Answer: Streptokinase

Question 4

Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

Accepted Answer

Wine and beer are produced without distillation whereas whisky, brandy and rum are produced by distillation of fermented broth.

Question 5

Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer from the options given below:

Accepted Answer

Azotobacter, Oscillatoria, Anabaena and Nostoc can fix nitrogen but Volvox cannot fix nitrogen.

Question 6

Which of the following microbes is NOT involved in the preparation of household products? A. Aspergillus niger B. Lactobacillus C. Trichoderma polysporum D. Saccharomyces cerevisiae E. Propionibacteri

Accepted Answer

Lactobacillus is used for production of curd. Saccharomyces cerevisiae is used for the fermentation of palm sap to obtain toddy drink. Propionibacterium sharmanii is used for production of swiss cheese. Aspergillus niger is used for the commercial production of citric acid. Trichoderma polysporum is used for the production of cyclosporin A and also act as a biocontrol agent. A , C are used in industrial production of citric acid and cyclosporin-A.

Question 7

Streptokinase produced by bacterium Streptococcus is used for

Accepted Answer

Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a 'clot buster' for removing clots from blood vessels of patients who have undergone myocardial infarction leading to heart attack. Curd production is done by Lactobacillus and ethanol production is done by Saccharomyces.

Question 8

Match List-I with List-II relating to microbes and their products: array |l|l|r|l| & array l List-I \ (Microbes) array & & array l List-II \ (Products) array \ A. & Streptococcus & I. & Citric acid

Accepted Answer

Streptokinase is produced by Streptococcus and is used as a clot buster for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack. - Cyclosporin A, that is used as an immuno-suppressive agent in organ-transplant patients, it is produced by the fungus Trichoderma polysporum - Statins produced by Monascus purpureus have been commercialized as blood-cholesterol lowering agent. - Citric acid is produced by Aspergillus niger

Question 9

Given below are two statements: Statement I: Antibiotics are chemicals produced by microbes that kill other microbes. Statement II: Antibodies are chemicals formed in body that eliminate microbes. In

Accepted Answer

The correct answer is option (3) as both statement I and statement II are correct. Antibiotics are chemicals produced by microorganisms. Antibiotics have the capacity to inhibit the growth and eventually destroy bacterial and other microorganisms in low concentration. Thus, statement I is correct. Antibodies are immunoglobulins produced in the body in response to any attack from pathogens. Antibodies facilitate killing of microbes by various mechanisms and provide immunity to the body. Thus, sta

Question 10

Match List I with List II Choose the correct answer from the options given below:

Accepted Answer

Answer option index: 1

Microbes in Human Welfare — Previous Year Questions & Solutions