Biology

Microorganisms in Food Production

1,086 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

Which organisms release carbon dioxide through ANAEROBIC cellular respiration?

  1. humans and bacteria that make yogurt

  2. humans and yeast

  3. yeast and plants

  4. all of these are correct
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yeast performs alcoholic fermentation, which releases carbon dioxide as a byproduct. While plants perform cellular respiration, they primarily use aerobic respiration; however, in the context of many biology curricula, yeast is the classic example of an organism that releases CO2 via anaerobic processes.

Multiple choice

What does alcoholic fermentation produce?

  1. Carbon dioxide

  2. Water

  3. Ethanol (alcohol)

  4. carbon dioxide and Ethanol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Alcoholic fermentation, performed by yeast and some bacteria, converts glucose into ethanol and carbon dioxide.

Multiple choice

What does lactic acid fermentation produce?

  1. Alcohol

  2. Lactic Acid

  3. Carbon Dioxide

  4. 36 ATP
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lactic acid fermentation is named for its primary product, lactic acid, which is produced in animal muscle cells during periods of low oxygen.

Multiple choice

What are the types of fermentation?

  1. Lactic Acid

  2. Alcoholic

  3. Oxygenated

  4. Lactic Acid and Alcohol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The two primary types of fermentation commonly taught in biology are lactic acid fermentation and alcoholic fermentation.

Multiple choice

which acid is present in curd ?

  1. lactic acid

  2. formic acid

  3. citric acid

  4. acetic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Curd contains lactic acid, which is produced by the fermentation of milk by lactic acid bacteria.

Multiple choice

Yeast is used in the production of which of the following?

  1. Wine

  2. Alcohol

  3. Fermentation

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

Yeast is a fungus used in the fermentation process to produce alcohol and carbon dioxide, which is essential for making wine and bread. Since all listed items relate to this process, 'All of these' is the correct choice.

Multiple choice

Formation of curd is a

  1. Fermantation process

  2. Estrifaction

  3. Purication

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

The formation of curd from milk is a fermentation process driven by lactic acid bacteria. The other terms are unrelated to this biological process.

Multiple choice

Name the microorganisms which help in curdling of milk .

  1. Lacto bacilus

  2. Rhizobium

  3. Vibro choleri

  4. E .Coli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lactobacillus (also spelled Lactobacillus) are bacteria that help in curdling milk by producing lactic acid. Rhizobium fixes nitrogen in legumes, Vibrio cholerae causes cholera, and E. coli is an intestinal bacterium.

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

Which of the following microorganisms converts milk into curd ?

  1. Yeast

  2. Aspergillus

  3. Penicillium

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

Lactobacillus converts milk into curd. It acts on the lactose of the milk and turns it into lactic acid. The increased acidity leads to the coagulation of casein protein of the milk and turns it into curd.

So, the correct answer is option D.

Multiple choice biology introduction to microbiology commercial use of microorganism microbes in household and industry food production and microorganisms

Which of the following is the microbe used in manufacturing vinegar?

  1. Streptococcus thermophilus

  2. Saccharomyces cerevisiae

  3. Acetobacter

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

The bacteria Acetobacter aceti is involved in the conversion of ethanol formed during fermentation into vinegar. This can happen when Acetobacter bacteria acts on alcoholic beverages such as wine and, therefore, vinegar may also be an undesirable product formed during alcoholic beverage production. 

Multiple choice chemistry carbon and its compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

Which method is used to get pure ethanol?

  1. Membrane technology

  2. Esterification

  3. Fermentation

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In industrial method, to obtain 100% pure alcohol, a small quantity of benzene is added to rectified spirit and the mixture is then distilled. Absolute alcohol is obtained in third fraction that distills over at 78.2°C (351.3 K).

None of the given method is correct. 

Option D is the answer.



Multiple choice innate and learned behaviour option a: neurobiology and behaviour biology

Coffee and Tea are

  1. Fermented beverages

  2. Alcoholic beverages

  3. Distilled beverages

  4. Non alcoholic beverages
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Coffee and tea are non alcoholic beverages. They are mild stimulating drinks which do not contain alcohol. Coffee and tea contain caffeine. Chemically caffeine is 1,3,7- trimethyl xanthine. It is a stimulant of CNS (Central nervous system). It is a mild diuretic and increases urine output. Tea and coffee reduce sleep and drowsiness and reduce anxiety. These beverages are addictive and withdrawal can cause muscle pain and headache.
So, the correct answer is 'Non alcoholic beverages'.
Multiple choice

What is lactogenesis?

  1. The cessation of milk production

  2. The initiation of milk secretion

  3. The initiation of estrus

  4. The initiation of mastitis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lactogenesis is the physiological process of the mammary gland transitioning to a state of active milk secretion, typically occurring around the time of parturition.