A compound which is produced by an organism that inhibits growth of other organism is
called:
1. xenobiotics
2. antibiotic
3. antibody
4. interferon
Select the correct statement
(1) Acetobacter aceti produces citric acid.
(2) Saccharomyces cerevisiae is used as clot buster
(3) Penicillium notanum restrict the growth of Staphylococci
(4) Methanogens are found in aerobic conditions.
Which of the following statements is incorrect regarding fermentation ?
1. Propionibacterium is used to ferment the cheese.
2. The puffed-up appearance of dough is due to the production of gas.
3. Fermentation in muscle produces ethanol.
4. Toddy is made by fermenting sap from palms.
Which of the following statements is correct?
1. | Aspergillus niger is used for producing cyclosporin A. |
2. | Activated sludge is digested by aerobic bacteria to produce marsh gas. |
3. | Fleming, Chain & Florey were awarded with Nobel Prize for discovering penicillin. |
4. | BOD is amount of oxygen produced by bacteria on decomposition. |
Select the correct pair of microorganism and the product obtained from it.
(1) Monascus purpureus - produces large holes in Swiss cheese.
(2) Saccharomyces cerevisiae - used for making wine and beer after distillation
(3) Streptococuss-produces streptokinase which is used to remove clots.
(4) Aspergillus niger - produces citric acid and butyric acid.
Select the incorrect match
(1) Citric acid - Aspergillus niger
(2) Streptokinase - Streptococcus
(3) Butyric acid - Clostridium acetobutylicum
(4) Cyclosporin-A - Monascus purpures
The domestic sewage in large cities
(1) has a high BOD as it contains both aerobic and bacteria
(2) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment plants (STPs)
(3) when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
(4) has very high amounts of suspended solids and dissolved salts
Which one is used/regarded as a biofertilizer?
1. An association between pteridophytes and cyanobacteria Anabaena
2. An association between gymnosperms and Nostoc
3. An association between legume and Rhizobium
4. All of the above
Name the blank spaces A, B, C and D given in the following table:
Type of Microbe |
Scientific Name |
Commercial. Product |
Bacterium |
A |
Lactic acid |
Fungus |
B |
Cyclosporin A |
C |
Monascus purpureus |
Statins |
Fungus |
Penicillium notatum |
D |
(1) A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Fungus), D - Penicillin
(2) A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Algae), D - Penicillin
(3) A - Lactobacillus, B - Trichoderma polysporum, C - Yeast (Prokaryote), D - Penicillin
(4) A - Lactobacillus, B - Trichoderma polysporum, C - Agaricus (Fungus), D - Penicillin
Name the blank spaces a, b, c and d given in the following table:
Type of Microbe |
Scientific Name |
Commercial Product |
Bacterium |
A |
Clot enzyme |
B |
Aspergillus niger |
Citric acid |
Fungus |
Trichoderma polysporum |
C |
Bacterium |
D |
Butyric add |
(1) A - Streptococcus, B - Fungus, C - Cyclosporin-A, D - Clostridium butylicum
(2) A - Clostridium butylicum, B - Streptococcus, C - Fungus, D - Cyclosporin-A
(3) A - Cyclosporin-A, B - Clostridium butylicum, C - Streptococcus, D - Fungus
(4) A - Fungus, B - Cyclosporin-A, C - Clostridium butylicum, D - Streptococcus