Biology

Microorganisms in Food Production

1,120 Questions

Microorganisms play a vital role in food production through processes like fermentation and bioprocessing. Questions on this topic cover the use of yeast, bacteria, and industrial microbiology. These concepts are important for science sections in various competitive exams.

Alcoholic fermentationDairy beverage productionIndustrial ethanol preparationCitric acid productionBiodigester temperature

Microorganisms in Food Production Questions

Multiple choice botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

Yeast is used in preparation of

  1. Acetic acid

  2. Curd

  3. Ethyl alcohol

  4. Cheese
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Yeast is a fungal species that converts carbohydrates to carbon dioxide and alcohols.
(A)Acetic acid bacteria are responsible for the production of Acetic acid.
(B)Lactobacillus is responsible for the conversion of milk into curd.
(C)Saccharomyces cerevisiae is responsible for the production of ethyl alcohol.
(D)Lactobacillus or Streptococcus is responsible for the conversion of production of cheese.

So, the correct answer is 'Ethyl alcohol'

Multiple choice botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

Product of fermentation of glucose by yeast is?

  1. $(C _6H _{10}O _5) _n$
  2. $C _2H _5OH$
  3. $C _6H _{12}O _6$
  4. $CH _3OH$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yeast is a fungal species that converts carbohydrates to carbon dioxide and alcohols. Saccharomyces cerevisiae is responsible for the production of ethyl alcohol.

So, the correct answer is 'C2H5OH'C2H5OH

Multiple choice botany biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

Which of the following yeasts is used in the preparation of beer and wine?

  1. Saccharomyces ludwigii

  2. Saccharomyces cerevisiae

  3. Schizosaccharomyces

  4. Ashbya gossypii
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Saccharomyces cerevisiae (common yeast) is a species of yeast. It is the most useful yeast, linked to wine making, baking and brewing. It is also called as baker's yeast or brewer's yeast.

Multiple choice biology biotechnology and genetic engineering use of microbes in biotechnology use of microbes in industrial applications useful microorganisms

The new strain of bacteria produced by biotechnology in alcohol industry is.

  1. Escheriachia coil

  2. Sacharomyces cerevisiae

  3. Bacillus subtills

  4. Pseudomonas putida
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pseudomonas putida is a bacterium that has been developed through biotechnology for applications in the alcohol industry. It can be used for various biotransformations and has applications in industrial fermentation processes. The other options are incorrect: E. coli (typo in option), S. cerevisiae is yeast not bacteria, and B. subtilis is not specifically associated with alcohol industry biotechnology.

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

250 g of $Methylophilus$ can be expected to produce ______ tonnes of proteins.

  1. 15

  2. 25

  3. 40

  4. 50
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A 250 kg cow produces 200 g of proteins per day. In the same period, 250 g of a microorganisms like Methylophilus methylotrophus because of its high rate of biomass production and growth, can be expected to produce 25 tonnes of protein.

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

Single cell protein can be obtained from 

  1. bacteria

  2. algae

  3. fungi

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Single cell protein can be obtained from cells of microorganisms such as yeast, fungi, algae and bacteria which are grown on carbon sources for synthesis. SCP is a protein supplement for animals and humans. Example ; Spirulina produces large quantity of food which are rich in protein, carbohydrates, fats, minerals and vitamins. It also reduces environmental pollution. 

So, the correct option is 'Option D' .

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

The extraction of single cell protein is a

  1. Costly process

  2. Microorganisms are present in very high concentration

  3. Must be hydrated to prevent spoilage

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The extraction and processing of single cell protein is generally considered a costly process due to the need for large-scale bioreactors, downstream processing, and purification.

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

Substrate used by microorganisms to produce single-cell proteins includes

  1. Methane gas

  2. Industrial wastes

  3. Agricultural wastes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Microorganisms used for SCP production can utilize various carbon sources, including methane, industrial byproducts, and agricultural wastes, making them highly versatile.

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

Which microorganism is used for processing of molasses 

  1. Aspergillus

  2. Agaricus

  3. Saccharomyces

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saccharomyces (yeast) is widely used for fermenting molasses into ethanol. Aspergillus is also used in industrial biotechnology for processing various substrates, making both valid contributors to industrial fermentation processes.

Multiple choice botany strategies for enhancement in food production balanced diet food production and microbes plant breeding for food production

Which of the following is not employed in single cell protein production?

  1. Chlorella

  2. Aspergillus

  3. Clostridium

  4. Saccharomyces
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Single cell protein (SCP) production relies on microorganisms like algae (Chlorella, Spirulina), fungi (Aspergillus), and yeast (Saccharomyces). Clostridium is a genus of bacteria primarily known for anaerobic processes like nitrogen fixation or fermentation, not typically for high-yield SCP production.

Multiple choice chemistry introduction to analytical chemistry interpreting a balanced chemical reaction percentage yield stoichiometric calculations

A bacterium can convert xylose to lactic acid with a percent yield of $85$%. What mass of lactic acid would be produced from $50.0\ g$ sample of xylose by this bacterium? (At. mass of xylose$(C _5H _{10}O _5) =150\ g/mol,$ At. of lactic acid$(C _3H _6O _3)=90\ g/mol$).

  1. $58.8\ g$
  2. $85\ g$
  3. $50\ g$
  4. $42.5\ g$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Percent Yield is the ratio of actual yield of a substance to the theoretical yield.

Percent Yield $= \dfrac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100$
Given, Theoretical Yield $50\space g,$ Percent Yield $= 85$
So, $(\dfrac{85}{100} \times 50) =$ Actual Yield
$\Rightarrow$ Actual Yield $= 42.5 \space g$