1. Which of the following is used for glutamic acid production?
a) Sucrose
b) Hydrolyzed cassava starch
c) Oleic acid
d) Corn steep
Explanation: Hydrolyzed cassava starch is used as a major carbon source of production of glutamic acid in Japan. It is a very useful constituent of the fermentation media.
2. Grapes are used in the production of beer.
a) True
b) false
Explanation: Grapes are useful in the production of wine. Grape juice is used as a carbon source in many fermentation industries. Saccharomyces cerevisiae ferments grapes for the production of wine
3. The sources of complex carbohydrates are wood wastes, straws, cobs, beet molasses, hydrol molasses.
a) true
b) false
Explanation: The sources of complex carbohydrates are wood wastes, straws, cobs, saw meal, corn, etc. They have a wide range of importance in fermentation industries
4. Which of the following is not a nitrogen source?
a) Waste liquor
b) Corn steep
c) Yeast extract
d) Peptones
Explanation: 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.
5. Which of the following is a by-product after starch extraction from maize?
a) Blackstrap molasses
b) Soybean
c) Corn steep liquor
d) Peptones
Explanation: 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.
6. Nitrogen sources used in media formulation are following except ______
a) Peptones
b) Soybean meal
c) Pharmamedia
d) Hydrocarbons
Explanation: Hydrocarbons are the part of carbon sources whereas peptones, soybean meal, pharmamedia are nitrogen sources used in media formulation.
7. Which of the following nitrogen source is used in penicillin production?
a) Peanut granules
b) Corn steep liquor
c) Phamamedia
d) Soybean meal
Explanation: 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.
8. Which of the following is not the constituent of pharmamedia?
a) Calcium
b) Valine
c) Riboflavin
d) Fluorine
Explanation: The Pharmamedia contains carbohydrates, reducing sugars, non-reducing sugars, valine, calcium, riboflavin, chloride, etc. Fluorine is not the constituent of pharmamedia.
9. Which of the following nitrogen source is used in bacitracin production?
a) Peanut granules
b) Corn steep liquor
c) Pharmamedia
d) Soybean meal
Explanation: The peanut granules are useful in the production of bacitracin. Bacitracin is an ointment that is used to prevent skin infections.
10. Which of the following is a ‘defined media’?
a) Synthetic media
b) Crude media
c) Simple media
d) Complex media
Explanation: 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.