Question

Azotobacter and Bacillus polymyxa are the examples of

A. symbiotic nitrogen-fixers
B. non-symbiotic nitrogen-fixers  
C. ammonifying bacteria
D. disease-causing bacteria
Answer :   non-symbiotic nitrogen-fixers

Releted MCQ Question on
Botany >> Microbes in Human Welfare

Releted Question 1

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

A. Floating debris
B. Effluents of primary treatment
C. Activated sludge
D. Primary sludge
View Answer
Releted Question 2

Match the following organisms with the products they produce:
a. Lactobacillus 1. Cheese
b. Saccharomyces cerevisiae 2. Curd
c. Aspergillus niger 3. Citric acid
d. Acetobacter aceti 4. Bread
5. Acetic acid

Select the correct option.

A. a-2, b-4, c-5, d-3
B. a-2, b-4, c-3, d-5
C. a-3, b-4, c-5, d-1
D. a-2, b-1, c-3, d-5
View Answer
Releted Question 3

Which of the following is a commercial blood cholesterol lowering agent?

A. Cyclosporin $$A$$
B. Statin
C. Streptokinase
D. Lipases
View Answer
Releted Question 4

Which of the following in sewage treatment removes suspended solids?

A. Secondary treatment
B. Primary treatment
C. Sludge treatment
D. Tertiary treatment
View Answer

Practice More Releted MCQ Question on
Microbes in Human Welfare

Practice More MCQ Question on Biology Section

BotanyThe Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisonTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and DevelopmentReproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental IssuesBotany Miscellaneous
ZoologyAnimal KingdomStructural Organisation in AnimalsBiomoleculesDigestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and Their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and IntegrationHuman ReproductionReproductive HealthEvolutionHuman Health and DiseasesBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsZoology Miscellaneous