Fermentation Technology Multiple Choice Questions on “Media for Industrial Fermentations – Nitrogen Sources”.
1. Which of the following is not a nitrogen source?
A. Waste liquor
B. Corn steep
C. Yeast extract
D. Peptonesid5fdc5d74385a1″
Answer: A
Clarification: The waste liquor is a part of carbon sources. Corn steep, yeast extract, peptones, etc. are nitrogen sources. Corn steep and yeast extract is useful in the production of alcohol and peptones are required for breaking the peptide bond of proteins.
2. Which of the following is a by-product after starch extraction from maize?
A. Blackstrap molasses
B. Soybean
C. Corn steep liquor
D. Peptonesid5fdc5d74385cb”
Answer: C
Clarification: Corn steep liquor is a by-product after starch extraction from maize. It is also useful in alcohol production. It contains vitamins, amino acids, and minerals required in the fermentation media.
3. Nitrogen sources used in media formulation are following except ______
A. Peptones
B. Soybean meal
C. Pharmamedia
D. Hydrocarbonsid5fdc5d74385db”
Answer: D
Clarification: Hydrocarbons are the part of carbon sources whereas peptones, soybean meal, pharmamedia are nitrogen sources used in media formulation.
4. Which of the following nitrogen source is used in penicillin production?
A. Peanut granules
B. Corn steep liquor
C. Phamamedia
D. Soybean mealid5fdc5d74385e7″
Answer: B
Clarification: Corn steep liquor has been used as a nitrogen source for the production of penicillin. It is obtained as a by-product after starch extraction from maize.
5. Which of the following is not the constituent of pharmamedia?
A. Calcium
B. Valine
C. Riboflavin
D. Fluorineid5fdc5d74385f2″
Answer: D
Clarification: The Pharmamedia contains carbohydrates, reducing sugars, non-reducing sugars, valine, calcium, riboflavin, chloride, etc. Fluorine is not the constituent of pharmamedia.
6. Which of the following nitrogen source is used in bacitracin production?
A. Peanut granules
B. Corn steep liquor
C. Pharmamedia
D. Soybean mealid5fdc5d74385fc”
Answer: A
Clarification: The peanut granules are useful in the production of bacitracin. Bacitracin is an ointment that is used to prevent skin infections.
7. Which of the following is a ‘defined media’?
A. Synthetic media
B. Crude media
C. Simple media
D. Complex mediaid5fdc5d7438606″
Answer: A
Clarification: The synthetic media is also called as a defined media as the ingredients in the crude media are in known concentration and pure form. It is used at small-scale levels.
8. Which of the following nitrogen source is used in the production of polyenes?
A. Peanut granules
B. Corn steep liquor
C. Pharmamedia
D. Soybean mealid5fdc5d7438610″
Answer: D
Clarification: Soybean meal is useful for the production of polyenes. Polyenes are the long chains of unsaturated hydrocarbons. It consists of several carbon-carbon double bonds.
9. What is the basic principle of Industrial Microbiology?
A. To provide optimum growth conditions
B. To provide aseptic conditions
C. To produce a pure product
D. To create a pure form of mediaid5fdc5d743861a”
Answer: A
Clarification: The basic principle of industrial microbiology is to provide optimum conditions like temperature, pH, pressure, etc. for the growth of microorganisms.
10. Which of the following is a raw material for the production of riboflavin?
A. Ammonium salt
B. Pharmamedia
C. Pancreatic digest of gelatin
D. Dried beef bloodid5fdc5d7438624″
Answer: C
Clarification: Pancreatic digest of gelatin is used as a raw material for the production of riboflavin. Riboflavin is a vitamin B2 which is required for the breakdown of biomolecules.
11. Crude media is an undefined media.
A. True
B. Falseid5fdc5d743862e”
Answer: A
Clarification: Crude media is an undefined media as it contains the undefined composition of nutrients, minerals, proteins, growth factors, etc. It is mostly used for the production at a large-scale.
12. Which of the following is the best for gibberellins production?
A. Ammonium salt
B. Peptones
C. Distillers’ solubles
D. Corn-steep liquorid5fdc5d7438637″
Answer: A
Clarification: Ammonium salt is used for the production of gibberellins. The gibberellins are the growth factors are produced by plants for the growth of the plant.
13. Which of the following is a raw material for butirosin production?
A. Ammonium salt
B. Pharmamedia
C. Pancreatic digest of gelatin
D. Dried beef bloodid5fdc5d7438641″
Answer: D
Clarification: The raw material for butirosin production is dried beef blood or haemoglobin. Butirosin is an antibiotic that is helpful in retarding the growth of both gram-positive and gram-negative bacteria.
14. Which of the following is the major and most important component of the medium?
A. Water
B. Carbon
C. Nitrogen
D. Mineralsid5fdc5d743864b”
Answer: A
Clarification: All the microorganisms require water for growth. It is the most important component useful for cleaning, rinsing, heating, and cooling. Water is required for the healthy metabolism of microorganisms.
15. The organism useful for fermentation process are ______
A. Bacteria
B. Virus
C. Protozoa
D. Algaeid5fdc5d7438655″
Answer: A
Clarification: Bacteria are the most useful microorganisms which help in the fermentation process. Bacteria is the large community of microorganism which has got a wide range of species.