Microbes in Human Welfare

Q. What is the primary benefit of using nitrogen-fixing bacteria in agriculture?
  • A. They increase soil acidity
  • B. They enhance soil structure
  • C. They provide a natural source of nitrogen
  • D. They promote plant disease resistance
Q. What is the primary function of actinomycetes in soil?
  • A. Nitrogen fixation
  • B. Decomposition of organic matter
  • C. Photosynthesis
  • D. Pathogen resistance
Q. What is the primary function of probiotics in human health?
  • A. To enhance digestion
  • B. To produce vitamins
  • C. To increase appetite
  • D. To cause infections
Q. What is the role of actinobacteria in soil health?
  • A. They cause plant diseases
  • B. They decompose organic matter
  • C. They fix carbon dioxide
  • D. They produce antibiotics
Q. What is the role of Rhizobium bacteria in legume plants?
  • A. Decomposing organic matter
  • B. Fixing atmospheric nitrogen
  • C. Promoting root growth
  • D. Producing secondary metabolites
Q. What is the role of Rhizobium in legume plants?
  • A. Decomposing organic matter
  • B. Fixing atmospheric nitrogen
  • C. Promoting root growth
  • D. Enhancing photosynthesis
Q. What is the role of Rhizobium in plant ecology?
  • A. Decomposing organic matter
  • B. Forming symbiotic relationships with legumes
  • C. Causing plant diseases
  • D. Producing antibiotics
Q. What is the significance of endophytes in plants?
  • A. They cause diseases
  • B. They enhance plant growth
  • C. They compete with roots for nutrients
  • D. They are harmful to humans
Q. What is the significance of using biopesticides derived from microbes?
  • A. They are more toxic than chemical pesticides
  • B. They can target specific pests without harming beneficial organisms
  • C. They are less effective than synthetic pesticides
  • D. They require more frequent application
Q. What is the significance of using microbes in bioremediation?
  • A. They increase soil fertility
  • B. They degrade environmental pollutants
  • C. They enhance plant growth
  • D. They produce biofuels
Q. What is the significance of using probiotics in agriculture?
  • A. They increase crop yield
  • B. They enhance soil pH
  • C. They promote weed growth
  • D. They reduce water retention
Q. What is the significance of using Trichoderma in agriculture?
  • A. It enhances photosynthesis
  • B. It acts as a biocontrol agent
  • C. It increases soil salinity
  • D. It promotes root growth
Q. What role do mycorrhizal fungi play in plant health?
  • A. They decompose organic matter
  • B. They fix atmospheric nitrogen
  • C. They enhance nutrient absorption
  • D. They produce plant hormones
Q. What type of symbiotic relationship exists between plants and mycorrhizal fungi?
  • A. Parasitism
  • B. Commensalism
  • C. Mutualism
  • D. Competition
Q. Which microbe is known for producing the antibiotic penicillin?
  • A. Bacillus cereus
  • B. Penicillium chrysogenum
  • C. Streptomyces griseus
  • D. Escherichia coli
Q. Which microbe is primarily responsible for the fermentation of bread?
  • A. Lactobacillus
  • B. Saccharomyces cerevisiae
  • C. Aspergillus niger
  • D. Clostridium botulinum
Q. Which microbe is primarily responsible for the fermentation of sauerkraut?
  • A. Lactobacillus
  • B. Bacillus
  • C. Clostridium
  • D. Staphylococcus
Q. Which microbe is primarily responsible for the fermentation process in bread making?
  • A. Lactobacillus
  • B. Saccharomyces cerevisiae
  • C. Rhizobium
  • D. Clostridium
Q. Which microbe is used in the production of vinegar?
  • A. Lactobacillus
  • B. Acetobacter
  • C. Saccharomyces
  • D. Bacillus
Q. Which of the following is a benefit of using composting in agriculture?
  • A. It increases soil erosion
  • B. It reduces soil fertility
  • C. It enhances soil microbial diversity
  • D. It requires chemical additives
Q. Which of the following is a benefit of using microbes in bioremediation?
  • A. They increase soil erosion
  • B. They can degrade pollutants
  • C. They promote invasive species
  • D. They reduce biodiversity
Q. Which of the following is a benefit of using microbes in composting?
  • A. They increase greenhouse gas emissions
  • B. They speed up the decomposition process
  • C. They reduce soil fertility
  • D. They promote weed growth
Q. Which of the following is a benefit of using probiotics in agriculture?
  • A. They increase crop yield
  • B. They reduce soil pH
  • C. They promote pest resistance
  • D. They enhance nutrient uptake
Q. Which of the following is a characteristic of rhizobia?
  • A. They are aerobic bacteria
  • B. They form nodules on plant roots
  • C. They are pathogenic to plants
  • D. They are unicellular fungi
Q. Which of the following is a method of biocontrol using microbes?
  • A. Using chemical pesticides
  • B. Introducing beneficial nematodes
  • C. Applying synthetic fertilizers
  • D. Utilizing Bacillus thuringiensis
Q. Which of the following microbes is commonly used in the production of yogurt?
  • A. Lactobacillus
  • B. Escherichia coli
  • C. Bacillus subtilis
  • D. Saccharomyces cerevisiae
Q. Which of the following microbes is essential for the fermentation process in bread making?
  • A. Yeast
  • B. Mold
  • C. Bacteria
  • D. Virus
Q. Which of the following microbes is used in the production of vinegar?
  • A. Lactobacillus
  • B. Acetobacter
  • C. Bacillus
  • D. Clostridium
Q. Which type of bacteria is commonly used in the production of yogurt?
  • A. Lactobacillus
  • B. Escherichia
  • C. Streptococcus
  • D. Bacillus
Q. Which type of microbe is primarily responsible for the fermentation process in bread making?
  • A. Lactic acid bacteria
  • B. Yeasts
  • C. Molds
  • D. Actinomycetes
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