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

Citric acid is obtained from

  1. Aspergillus niger

  2. Rhizobium nigricans

  3. Penicillium citrinum

  4. Lactobacillus bulgaricus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aspergillus niger is a fungus widely used in industrial biotechnology for the large-scale production of citric acid through fermentation processes.

Multiple choice

Streptokinase, used as a 'clot buster' is obtained from

  1. Streptococcus

  2. Staphylococcus

  3. Lactobacillus

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

Streptokinase is an enzyme produced by certain strains of Streptococcus bacteria. It is used medically to dissolve blood clots in patients suffering from myocardial infarction.

Multiple choice

Acetic acid is produced with the help of

  1. Albugo species

  2. Acetobacter species

  3. Aspergillus species

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

Acetic acid (vinegar) is produced through the oxidation of ethanol by bacteria of the genus Acetobacter.

Multiple choice

Fungi are like plants in many ways except they...

  1. Do not grow upward out of the soil

  2. Do not have eukaryotic cells

  3. Do not have cellulose

  4. Cannot make there own food
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi are heterotrophs that cannot produce their own food through photosynthesis, unlike plants. They absorb nutrients from organic matter in their environment, which is a key difference from autotrophic plants.

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

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 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.

Multiple choice botany biotechnology and its applications biotechnological regulations pcr asexual modes of reproduction

If the fermentation of molasses during the manufacturing of ethyl alcohol is delayed then the conclusion that can drawn is

  1. Molasses is diluted

  2. Molasses is not diluted

  3. More yeast is added

  4. Temperature is maintained around 410 K
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The sugarcane molasses are generally used as the fermentation medium. 
  • The yeast cells are grown in this medium to perform anaerobic respiration which produces ethanol and carbon dioxide. 
  • The molasses which are used is diluted so that the activity of yeast cells is fast and the production of ethanol occurs at a rapid pace. 
  • If the process is slowed down, then the molasses must not have been diluted before the addition of the fermentation medium in the fermentor.
  • Thus, the correct answer is option B. 
Multiple choice

Which grain is commonly used in brewing beer and is known for its malting process?

  1. Wheat

  2. Rice

  3. Corn

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

Barley is a cereal grain commonly used in brewing beer. It undergoes a malting process, where it is soaked, germinated, and dried to produce malt, a key ingredient in beer production.

Multiple choice

What is the term used for the process of fermenting food using microorganisms such as bacteria or yeast?

  1. Pickling

  2. Smoking

  3. Curing

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

Fermentation is a culinary technique that involves using microorganisms such as bacteria or yeast to convert carbohydrates into alcohol or acids, creating unique flavors and textures in food.