Which of the following statements about methanogens is not correct?

1. They can be used to produce biogas.
2. They are found in the rumen of cattle and their excreta.
3. They grow aerobically and breakdown cellulose-rich food.
4. They produce methane gas.

Subtopic:  Microbes in Production of Biogas |
 91%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers?

1. Aspergillus and Rhizopus

2. Rhizobium and Rhizopus

3. Cyanobacteria and Rhizobium

4. Aspergillus and Cyanobacteria

Subtopic:  Microbes as Biofertilizer |
 80%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

For a biocontrol agent to be part of an integrated pest management, it should be:

1. species-specific and symbiotic

2. free living and broad spectrum

3. narrow spectrum and symbiotic

4. species-specific and inactive on non-target organisms

Subtopic:  Microbes in Biocontrol Agent |
 73%
From NCERT
NEET - 2019
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Common cold is not cured by antibiotics because it is
1. caused by a virus
2. caused by a Gram-positive bacterium
3. caused by a Gram-negative bacterium
4. not an infectious disease

Subtopic:  Industrial Products, Beverages & Antibiotics |
 87%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Probiotics are     
1. live microbial food supplement
2. safe antibiotics
3. cancer-inducing microbes
4. new kind of food allergens 

Subtopic:  Microbes in Household Products | Chemicals, Enzymes & Other Bioactive Molecules |
 68%
Please attempt this question first.
Hints

Which of the following organisms are helpful in making curd form milk. production of streptomycin and nitrogen fixation in legumes?

1. Mycoplasma

2. Eubacteria

3. Archaebacteria

4. Cyanobacteria

Subtopic:  Microbes in Household Products | Chemicals, Enzymes & Other Bioactive Molecules | Microbes as Biofertilizer |
 55%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

One of the major difficulties in the biological control of insect/pest is that

(1) The method is less effective as compared with the use of insecticides

(2) The practical difficulty of introducing the predator to specific areas

(3) The predator develops a preference to other deits and may itself become a pest

(4) The predator does not always survive when transferred to a new environment

Subtopic:  Microbes in Biocontrol Agent |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

What are flocs?

(1) Masses of anaerobic bacteria

(2) Masses of aerobic fungi only

(3) Masses of anaerobic bacteria and fungi

(4) Masses of aerobic bacteria associated with fungal filaments

Subtopic:  Microbes in Sewage Treatment |
 83%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

All are correct with respect to BOD (Biochemical oxygen Demand), except

1. It refers to the amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidized by bacteria

2. The BOD test is a measure of the organic matter present in the water

3. The greater the BOD of waste water, less is its polluting potential

4. Waste water is treated till BOD is reduced significantly

Subtopic:  Microbes in Sewage Treatment |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

During sewage treatment, biogases are produced which include :

1. Methane,oxygen, hydrogen sulphide

2. Hydrogen sulphide, methane, sulphur dioxide

3. Methane, hydrogen sulphide, carbon dioxide

4. Hydrogen sulphide, nitrogen, methane

Subtopic:  Microbes in Production of Biogas |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh