Tag: uses of microorganisms

Questions Related to uses of microorganisms

Which of the following grows in the form of multicellular filaments? 

biology micro organisms food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Bacteria

  2. Mould

  3. Amoeba

  4. None of the above

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Correct Option: B
Explanation:

(A)Bacteria grows in the form of colonies.

(B)Mould grows in the form of filaments.
(C)Amoeba has a definite irregular shape growth.
So, the correct answer is 'Mould'

Which among the following is the real product of the honey bee?

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Pollen

  2. Bee wax

  3. Honey

  4. Propolis

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Correct Option: B
Explanation:

Beewax is the natural secretion of the worker bees and is poured out in thin delicate flakes. It is made of:(i) even numbered alcohols. (ii) even numbered fatty acids and (iii)  odd numbered normal paraffins.

Out of the total amount of sunlight falling on the earth only about ____________ $\%$ is utilized for production of food.

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. $5$

  2. $3$

  3. $0.02$

  4. $2$

Show answer
Correct Option: C
Explanation:

About $34\%$ of sunlight is reflected back out of the total amount of sunlight falling on earth. $10\%$ is absorbed by ozone and out of remaining $56\%$ only $0.02\%$ is used for photosynthesis.

Curing of Tea leaves is accomplished by

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Viruses

  2. Fungi

  3. Mycorrhiza

  4. Bacteria

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Correct Option: D
Explanation:

Curing of tea leaves is accomplished by bacteria. Leaves of tea and tobacco are cured off their bitterness with the help of certain bacteria, e.g., Bacillus megatherium. Beans of coffee and cocoa are similarly cured.

A number of organic compounds can be decomposed by

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Pseudomonas

  2. Mycoplasma

  3. Chemolithotrophs

  4. Azotobacter

Show answer
Correct Option: A
Explanation:

Organic compounds like plant and animal residues are present in the soil. These organic compounds are broken down by a large number of bacteria, fungi, larger organisms. Bacteria like Pseudomonas lives in the soil and decomposes organic compounds and releases carbon dioxide, energy, water and other plant nutrients.

Thus, the correct answer is 'Pseudomonas.'

Which of the following have been more often used than any other group of plant substance n chemotaxonomic studies $2$?

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Falconoid

  2. Trapezoids

  3. Alkaloids

  4. Iridoids

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Correct Option: A

Caffeine, a constituent of tea and coffee is actually.

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. A polyamine

  2. An oligosaccharide

  3. An alkaloid

  4. A lipoprotein

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Correct Option: A

The most thoroughly studied of the known bacteria-plant interactions is the :-

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Gall formation on certain angiosperms by Agrobacterium

  2. Nodulation of Sesbania stems by nitrogen fixing bacteria

  3. Plant growth stimulation by phosphate solubilising bacteria

  4. Cyanobacterial symbiosis with some aquatic ferns

Show answer
Correct Option: A
Explanation:
Agrobacterium tumefaciens is called a natural plant genetic engineer. Using Agrobacterium vector, nematode specific genes were introduced into the host plant. The introduction was as such that it produced both sense and anti-sense RNA in the host cells. These two RNA's being complementary to each other formed a double-stranded (ds-RNA) that initiated RNAi and thus, silenced the specific mRNA of the nematode. The Agrobacterium is most widely studied of the known bacteria-plant interactions.
So the correct answer is 'Option A'.

Commercial source of manufacture of cheese especially for giving flavour to it, its from _____________.

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. Citrus fruit

  2. Aspergillus

  3. Penicillium

  4. Bacteria

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Correct Option: D

Which one of the following is a viral disease of chickens ?

biology food production food production and microorganisms microbial products - food, medicines and industrial products uses of microorganisms

  1. pullorum disease

  2. Ranikhet

  3. mycotic disease

  4. fowl spirochaetosis.

Show answer
Correct Option: B
Explanation:

Ranikhet disease, also known as new castle disease, is found in young birds. Its symptoms include sneezing, gasping and often  droopiness. The affected birds are depressed with ruffled feathers. Control of Ranikhet disease can be done by sanitary and vaccination measures.