Microbes In Human Welfare Chapter-Wise Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following microbes is used for biogas production?

Methanobacterium
Lactobacillus
Saccharomyces cerevisiae
Pseudomonas
1

Methanobacterium is an anaerobic bacterium involved in methane production in biogas plants.

Which of the following statements about industrial uses of microbes is correct?

Aspergillus niger is used for ethanol production.
Saccharomyces cerevisiae is used in bread-making.
Pseudomonas is used in cheese production.
Lactobacillus is used for antibiotic production.
2

Saccharomyces cerevisiae (yeast) ferments sugar to produce carbon dioxide, making bread rise.

Which microorganism is commonly used in single-cell protein (SCP) production?

Methanobacterium
Spirulina
Pseudomonas
Clostridium
2

Spirulina, a cyanobacterium, is widely used in Single Cell Protein (SCP) production due to its high protein content.

Which of the following microbes is commonly used for biological control of plant pathogens?

Rhizobium
Trichoderma
Pseudomonas
Saccharomyces cerevisiae
2

Trichoderma is a fungal biocontrol agent used to suppress plant pathogens.

Which of the following biofertilizers is most effective in increasing nitrogen content in paddy fields?

Azospirillum
Glomus
Nostoc
Rhizobium
3

Nostoc, a cyanobacterium, fixes atmospheric nitrogen, enriching soil fertility in paddy fields.

Which microbial enzyme is used to clarify fruit juices?

Lipase
Pectinase
Protease
Amylase
2

Pectinase breaks down pectin in fruit juices, making them clearer.

Which microorganism is used for the production of butanol and acetone?

Clostridium butylicum
Aspergillus niger
Saccharomyces cerevisiae
Lactobacillus
1

Clostridium butylicum ferments carbohydrates to produce butanol and acetone.

Which of the following microbes is used in biogas production?

Methanobacterium
Lactobacillus
Rhizobium
Pseudomonas
1

Methanobacterium is an anaerobic microbe that helps in methane production in biogas plants.

Which of the following microbes is used in the biological control of butterfly caterpillars?

Bacillus thuringiensis
Aspergillus
Rhizobium
Pseudomonas
1

Bacillus thuringiensis produces toxins that kill butterfly caterpillars, making it a biocontrol agent.

Which microorganism is used to ferment palm sap to produce the traditional drink 'toddy'?

Saccharomyces cerevisiae
Acetobacter aceti
Lactobacillus
Clostridium
1

Saccharomyces cerevisiae ferments palm sap to produce toddy, a traditional drink in some parts of India.

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