Microbes in Human Welfare

Microbes in Human Welfare

Easy Questions

Advanced Botany

Plant Growth and Development
Organisms and Populations
Ecosystem
Biodiversity and Conservation
Environmental Issues
Microbes in Human Welfare
Strategies for Enhancement in Food Production
Molecular Basis of Inheritance
Principles of Inheritance and Variation
Sexual Reproduction in Flowering Plants
Reproduction in Organisms
The Living World
Respiration in Plants
Photosynthesis
Mineral Nutrition
Transport in Plants
Cell Cycle and Cell Division
Cell-The Unit of Life
Anatomy of Flowering Plants
Morphology of Flowering Plants
Plant Kingdom
Biological Classification
  1. Probiotics are








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    Probiotics are defined as live microorganisms, including Lactobacillus species, Bifidobacterium species and yeasts, that may beneficially affect the host upon ingestion by improving the balance of the intestinal microflora. The dietary use of live microorganisms has a long history.

    Correct Option: C

    Probiotics are defined as live microorganisms, including Lactobacillus species, Bifidobacterium species and yeasts, that may beneficially affect the host upon ingestion by improving the balance of the intestinal microflora. The dietary use of live microorganisms has a long history.

  1. Which one of the following pairs is wrongly matched?








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    Coliforms are a broad class of bacteria found in our environment, including the feces of man and other warm-blooded animals. The presence of coliform bacteria in drinking water may indicate a possible presence of harmful, disease-causing organisms.

    Correct Option: C

    Coliforms are a broad class of bacteria found in our environment, including the feces of man and other warm-blooded animals. The presence of coliform bacteria in drinking water may indicate a possible presence of harmful, disease-causing organisms.

  1. Which one of the following micro-organisms is used for production of citric acid in industries?








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    Aspergillus niger is known as guinea pig of kingdom fungi. The main source of commercial preparation of citric acid is the fermentation of sugar with Aspergillus niger.

    Correct Option: B

    Aspergillus niger is known as guinea pig of kingdom fungi. The main source of commercial preparation of citric acid is the fermentation of sugar with Aspergillus niger.

  1. Industrial production of ethanol from starch is brought about by








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    Yeast helps in ethyl alcohol formation. Lactobacillus is the milk bacteria while is the free living nitrogen fixing bacteria and Penicillium is the source of Penicillin.

    Correct Option: A

    Yeast helps in ethyl alcohol formation. Lactobacillus is the milk bacteria while is the free living nitrogen fixing bacteria and Penicillium is the source of Penicillin.

  1. During the formation of bread it becomes porous due to release of CO2 by the action of








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    Yeast carry out fermentation, releasing CO2 making bread soft and porous. Hence, Saccharomyces is referred to as baker’s yeast.

    Correct Option: A

    Yeast carry out fermentation, releasing CO2 making bread soft and porous. Hence, Saccharomyces is referred to as baker’s yeast.