Microbes in Human Welfare Chapter-Wise Test 21

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which type of bacteria is used in the biological treatment of sewage to form microbial flocs?

Methanogenic bacteria
Aerobic heterotrophic bacteria
Denitrifying bacteria
Cyanobacteria
2

Aerobic heterotrophic bacteria form microbial flocs in aeration tanks, which help in the biological treatment of sewage.

Which microbe is used in biological pest control against mosquitoes?

Bacillus thuringiensis
Bacillus sphaericus
Pseudomonas
Trichoderma
2

Bacillus sphaericus is used as a biocontrol agent to target mosquito larvae.

Which of the following microbes is commonly used in the bioremediation of oil spills?

Pseudomonas
Saccharomyces cerevisiae
Rhizobium
Lactobacillus
1

Pseudomonas species can degrade petroleum hydrocarbons and are used in oil spill bioremediation.

Which bioactive molecule is produced by Trichoderma polysporum?

Cyclosporin A
Statins
Streptokinase
Pectinase
1

Cyclosporin A, produced by Trichoderma polysporum, is used as an immunosuppressant in organ transplants.

Which bioactive molecule is produced by Monascus purpureus?

Penicillin
Statins
Streptokinase
Cyclosporin A
2

Statins, produced by Monascus purpureus, are used to lower cholesterol levels in humans.

Which of the following statements about biofertilizers is correct?

Rhizobium fixes atmospheric nitrogen in cereal crops.
Cyanobacteria like Nostoc help in nitrogen fixation.
Biofertilizers reduce soil fertility over time.
Azotobacter forms a symbiotic relationship with legumes.
2

Cyanobacteria like Nostoc and Anabaena are free-living nitrogen-fixing organisms that enhance soil fertility.

Which of the following is a bacterial biofertilizer commonly used in rice fields?

Azospirillum
Trichoderma
Rhizobium
Pseudomonas
1

Azospirillum is a free-living nitrogen-fixing bacterium that improves soil fertility in rice fields.

Which of the following microbes is used in the fermentation of dosa and idli batter?

Lactobacillus
Saccharomyces cerevisiae
Acetobacter aceti
Aspergillus niger
1

Lactobacillus ferments the batter, producing carbon dioxide that makes it fluffy.

Which of the following microbes is used as a biopesticide?

Bacillus thuringiensis
Escherichia coli
Lactobacillus
Saccharomyces cerevisiae
1

Bacillus thuringiensis produces toxins that act as natural insecticides.

Which gas is predominantly produced during microbial biogas production?

Oxygen
Carbon dioxide
Methane
Nitrogen
3

Methane is the major gas produced by methanogenic bacteria during biogas production.

Performance Summary

Score:

Category Details
Total Attempts:
Total Skipped:
Total Wrong Answers:
Total Correct Answers:
Time Taken:
Average Time Taken per Question:
Accuracy:
0