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Q. No.Citric acid, widely used in the food industry, can be commercially produced with the help of the microbe:
1.
Propionibacterium shermanii
2.
Aspergillus niger
3.
Xanthomonas citri
4.
Colletotrichum falcatum
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
91%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Cyclosporin A | Immuno-suppressant from Trichoderma polysporum |
| 2. | Statins | Blood cholesterol lowering agents from Monascus purpureus |
| 3. | Streptokinase | Clot buster from Staphylococcus aureus |
| 4. | Penicillium notatum | Source of antibiotic discovered by Fleming |
Subtopic: Industrial Products, Beverages & Antibiotics | Chemicals, Enzymes & Other Bioactive Molecules |
84%
From NCERT
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In biological nitrogen fixation by microbes:
I. Rhizobium fixes nitrogen in the root nodules of leguminous plants
II. Frankia fixes nitrogen in the root nodules of non-leguminous [actinorrhizal] plants
III. Mycorrhiza are symbiotic relation between vascular plants and fungi [genus Glomus] that help plants absorb minerals like phosphorus
IV. Cyanobacteria [Anabaena, Nostoc and Oscillatoria] serve as important biofertlizers in paddy fields
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
I. Rhizobium fixes nitrogen in the root nodules of leguminous plants
II. Frankia fixes nitrogen in the root nodules of non-leguminous [actinorrhizal] plants
III. Mycorrhiza are symbiotic relation between vascular plants and fungi [genus Glomus] that help plants absorb minerals like phosphorus
IV. Cyanobacteria [Anabaena, Nostoc and Oscillatoria] serve as important biofertlizers in paddy fields
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Microbes as Biofertilizer |
77%
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In sewage treatment:
1. The primary treatment involves aerobic bacteria
2. The BOD of the water gets increased after treatment
3. Activated sludge is digested in anaerobic sludge digester to produce biogas
4. Primary sludge contains methonogens
1. The primary treatment involves aerobic bacteria
2. The BOD of the water gets increased after treatment
3. Activated sludge is digested in anaerobic sludge digester to produce biogas
4. Primary sludge contains methonogens
Subtopic: Microbes in Sewage Treatment |
85%
From NCERT
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Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A :
1. Streptococcus cerevisiae
2. Trichoderma polysporum
3. Clostridium butylicum
4. Aspergillus niger
1. Streptococcus cerevisiae
2. Trichoderma polysporum
3. Clostridium butylicum
4. Aspergillus niger
Subtopic: Industrial Products, Beverages & Antibiotics |
91%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Match List I with List II
Choose the correct answer from the options given below:
1. A-II , B-I, C-IV , D- III
2. A-IV , B-III, C-I, D-II
3. A-I, B-II, C-III, D - IV
4. A-IV, B-III , C - II , D-I
| List - I | List II | ||
| A. | Streptococcus | I. | Diffusion |
| B. | Thiobacillus | II. | Nitrogen fixation |
| C. | Porins | III. | Denitrification |
| D. | Beijernickia | IV. | "Clot buster" |
Choose the correct answer from the options given below:
1. A-II , B-I, C-IV , D- III
2. A-IV , B-III, C-I, D-II
3. A-I, B-II, C-III, D - IV
4. A-IV, B-III , C - II , D-I
Subtopic: Industrial Products, Beverages & Antibiotics |
88%
From NCERT
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In organ transplantations, cyclosporine A is used as an immune-suppressive agent which is produced by
1. Saccharomyces cerevisiae
2. Trichoderma polysporum
3. Monascus purpureus
4. Aspergillus niger
1. Saccharomyces cerevisiae
2. Trichoderma polysporum
3. Monascus purpureus
4. Aspergillus niger
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
95%
From NCERT
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
| Statement I: | Sewage discharge in a flowing river causes an increase in biochemical oxygen demand (BOD) due to the biodegradation of organic matter by microbes. This leads to the mortality of fish and other aquatic creatures |
| Statement II: | Sewage discharge in a flowing river causes a sharp decline in dissolved oxygen (DO) downstream from point of discharge due to increased consumption of DO by microbes. This leads to the mortality of fish and other aquatic creatures |
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic: Microbes in Sewage Treatment |
72%
From NCERT
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Match List I with List II
Choose the correct answer from the options given below
1. A-(I) , B-(II), C-(III), D-(IV)
2. A-(II) , B-(III), C-(IV), D-(I)
3. A-(III) , B-(IV), C-(I), D-(II)
4. A-(IV) , B-(III), C-(II), D-(I)
| List I | List II |
| A. Sausage | I. Saccharomyces cerevisiae |
| B. Yogurt | II. Enterobacter cloacae |
| C. Bread | III. Pediococcus cerevisiae |
| D. Sauerkraut | IV. Streptococcus thermophilus |
Choose the correct answer from the options given below
1. A-(I) , B-(II), C-(III), D-(IV)
2. A-(II) , B-(III), C-(IV), D-(I)
3. A-(III) , B-(IV), C-(I), D-(II)
4. A-(IV) , B-(III), C-(II), D-(I)
Subtopic: Microbes in Household Products |
91%
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Bioactive molecule Cyclosporin A, used as an immunosuppressive agent in organ-transplant patient, is produced by
1. Monascus purpureus
2. Aspergillus niger
3. Trichoderma polysparum
4. Clostridium butylicum
1. Monascus purpureus
2. Aspergillus niger
3. Trichoderma polysparum
4. Clostridium butylicum
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
94%
From NCERT
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