Microbes in industrial products - antibiotics, acids, enzymes — practice questions

Question 1 · difficulty L1 · recall

Which microbe is used commercially to produce citric acid?

• A. A. niger
• B. Lactobacillus
• C. Methanobacterium species
• D. Rhizobium

Question 2 · difficulty L2 · understanding

Which microbial product is used as a clot-buster in patients with blocked blood vessels?

• A. Statin
• B. Cyclosporin A
• C. Streptokinase
• D. Pectinase

Question 3 · difficulty L2 · understanding

Why are pectinases and proteases useful in the commercial processing of fruit juices?

• A. They convert glucose directly into penicillin
• B. They produce methane
• C. They increase nitrogen fixation
• D. They help clarify the juice

Question 4 · difficulty L2 · understanding

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

• A. Beer
• B. Rum
• C. Whisky
• D. Brandy

Question 5 · difficulty L2 · understanding

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:

• A. B only
• B. E only
• C. A only
• D. D only

Question 6 · difficulty L2 · understanding

Streptokinase produced by bacterium Streptococcus is used for

• A. Liver disease treatment
• B. Removing clots from blood vessels
• C. Curd production
• D. Ethanol production

Question 7 · difficulty L3 · application

Which yeast is commonly used in commercial production of ethanol?

• A. Penicillium notatum
• B. S. cerevisiae
• C. Trichoderma polysporum
• D. Azotobacter

Question 8 · difficulty L3 · application

A fermentation tank is inoculated with Monascus purpureus. Which industrial product is expected?

• A. Statins
• B. Penicillin
• C. Citric acid
• D. Methane

Question 9 · difficulty L3 · understanding

$$\text { Match List I with List II: }$$ $$\text { List I (Bioactive molecules) }$$ $$\text { List II (Importance) }$$ A. Streptokinase I. Immunosuppressive agent B. Statins II. Removal of clots from the blood vessels C. Lipases III. Blood cholesterol-lowering agent D. Cyclosporin A IV. Detergent formulations Choose the correct answer from the options given below:

• A. A-II, B-III, C-I, D-IV
• B. A-IV, B-III, C-II, D-I
• C. A-III, B-II, C-IV, D-I
• D. A-II, B-III, C-IV, D-I

Question 10 · difficulty L3 · understanding

Match List-I with List-II relating to microbes and their products: List - I (Microbes) List - II (Products) (A) Streptococcus (I) Citric acid (B) Trichoderma polysporum (II) Clot buster (C) Monascus purpureus (III) Cyclosporin A (D) Aspergillus niger (IV) Statins Choose the correct answer from the options given below:

• A. A-II, B-III, C-IV, D-I
• B. A-I, B-II, C-III, D-IV
• C. A-I, B-III, C-II, D-IV
• D. A-I, B-IV, C-II, D-III