250+ MCQs on Media for Industrial Fermentations – Minerals, Growth Factors and Buffers and Answers

Fermentation Technology Questions and Answers for Aptitude test on “Media for Industrial Fermentations – Minerals, Growth Factors and Buffers”.

1. Which of the following mineral is not required for microorganism?
A. Pb
B. K
C. S
D. Mgid5fdbac62ba61b”

Answer: A
Clarification: The minerals required to microorganisms are Potassium, Sulphur, Calcium, Chlorine, Phosphorus, Magnesium, Iron, etc. Lead (PB. is not required in media as it can be poisonous to microorganisms.

2. All microorganisms require minerals for growth and metabolism.
A. True
B. Falseid5fdbac62ba63e”

Answer: A
Clarification: All the microorganisms require minerals for proper growth and metabolism of the body. Minerals are the essential components added in the fermentation medium.

3. Which of the following trace element influence the production of Mitomycin?
A. Zn
B. Fe
C. Mn
D. Cuid5fdbac62ba64b”

Answer: B
Clarification: Iron influences the production of Mitomycin. Mitomycin is an important drug which is used to treat different types of cancer. Mitomycin is obtained from a soil fungus.

4. Which of the following resists the change in pH?
A. Buffer
B. Growth factors
C. Minerals
D. Inhibitorsid5fdbac62ba655″

Answer: A
Clarification: The solution which resists the change in pH of the media is called a buffer solution. It may be acidic or basic buffer solution. Buffers are required for maintaining the pH of the fermentation medium.

5. Which of the following is an example of a chelating agent?
A. Magnesium
C. Ca
D. Glycerolid5fdbac62ba65f”

Answer: B
Clarification: The chelating agent is added to the medium to prevent the precipitation of metal phosphates. One of the examples of the chelating agent is EDTA.

6. The _____________ are not the growth factors.
A. Vitamins
B. Amino acids
C. Fatty acids
D. Carbohydratesid5fdbac62ba668″

Answer: D
Clarification: Vitamins, amino acids, fatty acids or sterols are the growth factors required for microorganisms to synthesize complements of cell components.

7. Which of the following is not an example of buffer?
A. CaCO3
C. NaH2PO4
D. NaOHid5fdbac62ba670″

Answer: D
Clarification: The examples of buffer solution are Calcium Carbonate (CaCO3), Monosodium phosphate (NaH2PO4) and Monopotassium phosphate (KH2PO4).

8. Chlorine does not appear to play a nutritional role in the metabolism of fungi.
A. True
B. Falseid5fdbac62ba679″

Answer: A
Clarification: Foster in 1949 discovered that chlorine does not play a nutritional role in the metabolism of fungi. However, it is required by some bacteria.

9. Which of the following trace element influence the production of Gentamicin?
A. Mn
B. Zn
C. Fe
D. Coid5fdbac62ba681″

Answer: D
Clarification: Cobalt influences the production of Gentamicin. Gentamicin is used to fight against a broad range of bacterial infections. It works by stopping the growth of bacteria.

10. Which of the following growth factor is used in vinegar production?
A. Calcium Carbonate
B. Calcium Phosphate
C. Calcium Pantothenate
D. Calcium Hydroxideid5fdbac62ba689″

Answer: C
Clarification: Calcium pantothenate is used as a growth factor useful in the production of vinegar. Vinegar is useful in cleaning and washing hairs and also in the preservation of food.

11. Iron, Zinc, Copper influence the production of ____________
A. Protease
B. Neomycin
C. Citric acid
D. Penicillinid5fdbac62ba69d”

Answer: D
Clarification: Ferrous, Copper and Zinc are the trace elements that influence the production of Penicillin. Penicillin is an antibiotic which helps in the bursting cell wall of bacteria, i.e., cell lysis.

12. Which of the following is not the product of fermented fruit?
A. Wine
B. Whisky
C. Vinegar
D. Beerid5fdbac62ba6a6″

Answer: C
Clarification: Wine, Beer, Whisky, Brandy, Rum are the products which are obtained from the fermentation of fruits like grapes. Vinegar is produced by the fermentation of sugars by bacteria.

13. Which of the following is the first step in Fermentation Technology?
A. Media Formulation
B. Isolation of microbes
C. Constructing of fermenter
D. Preservation of microbesid5fdbac62ba6af”

Answer: A
Clarification: The first step of Fermentation Technology is isolation and detection of microbes of interest by various methodologies. Crowded Plate, Auxanographic techniques are used in the detection and isolation of organisms.

14. Which of the following reactor is best for the production of vinegar?
A. Batch reactors
B. Fed-Batch reactors
C. Continuous reactors
D. Submerged reactorsid5fdbac62ba6b7″

Answer: B
Clarification: The Fed-Batch reactor is useful in the production of vinegar because the fed-batch culture can maintain low ethanol concentrations.

15. Which of the following is not a non-essential mineral?
A. Molybdenum
B. Iron
C. Calcium
D. Cobaltid5fdbac62ba6c0″

Answer: C
Clarification: Calcium is used as an essential mineral in the fermentation media whereas iron, molybdenum, cobalt, etc. are non-essential media.

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