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Microbes in Human Welfare

Multiple Choice Questions

91. Which of the following can be controlled by using biopesticides ?

Insects
Diseases
Weeds
All of them

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92. Biofertilizers include :

Blue-green algae, rhizobia, other nitrogen fixing bacteria and mycorrhiza fungi
Blue-green algae, rhizobia and other nitrogen fixing bacteria
Rhizobia, other nitrogen fixing bacteria and mycorrhiza fungi
Blue-green algae, rhizobia and mycorrhiza fungi

193 Views

93. Which of the following risks are associated with genetically modified food ?

I. Toxicity

II. Allergic reaction

III. Antibiotic resistance in micro-organisms present in alimentary canal

I and II
I, II and III
I and III
II and III

136 Views

94. A transgene expression can achieve which of the following ?

Prevent expression of a native gene
Modify an existing biosynthetic pathway
Produce a protein that itself produces the phenotype of interest or is the product of interest
All of the above

123 Views

Short Answer Type

95.

Mention a product of human welfare obtained with the help of each one of the following microbes:

(a) LAB

(b) Saccharomyces cerevisiae

(d) Aspergillus niger

922 Views

96.
Choose any three microbes, from the following which are suited for organic farming which is in great demand these days for various reasons. Mention one application of each one chosen.

Mycorrhiza; Monascus; Anabaena; Rhizobium; Methanobacterium; Trichoderma.

Following three microbes can be chosen for organic farming:

1. Mycorrhiza: It helps in the absorption of phosphorous from the soil.

2. Anabaena: It is involved in the process of nitrogen fixation.

3. Rhizobium: It fixes nitrogen into organic forms, which can be used by the plant as nutrient.

The application of the following are:

1. Monascus: It is produces Statins that are used commercially as blood-cholesterol lowering agents.

2. Methanobacterium: It is used in the biological generation of methane by anaerobic processes.

3. Trichoderma: It produces cyclosporin A which is used as an immunosuppressive agent.

684 Views

97.

Draw a labelled sketch of sparged-stirred-tank bioreactor. Write its application.

1000 Views

98.

Name two commonly used bioreactors. State the importance of using a bioreactor.

688 Views

99.

Name the source of streptokinase. How does this bioreactor molecule function in our body?

729 Views

100.

How do mycorrhizae act as biofertilizers? Explain. Name a genus of fungi that forms a mycorrhizal association with plants.

849 Views