Q. Enzyme responsible for the conversion of sugar to alcohol and CO2
- Amylase
- Fermentase
- Zymase
- None of the above
Answer: c)
The enzyme zymase can convert glucose into ethanol. This enzyme naturally transpires in yeast and other anaerobic organisms. These enzymes are specifically utilized in the preparation of alcoholic beverages commercially.
Q. ___________is used for inhibiting fungal growth and non-enzymatic browning in fruit juices
- Sulphur dioxide
- Sodium benzoate
- Sorbic acid
- All of the above
Answer: a)
In the past cut fruits and vegetables in salads bars were sprayed or dipped in a solution of sulphites. Sulphur dioxide also inhibits non- enzymatic browning and keeps plant tissue fresh for longer period.
Q. The method of preserving food by canning is discovered by the scientist
- Louis Pasteur
- Thomas Edison
- Nicholas Appert
- None of the above
Answer: c)
Nicolas Appert
Conventional canning as we know it today began with Nicolas Appert, the original Food in Jars guy. A Parisian confectioner and chef, Nicolas began experimenting with preservation during the late 1700s, and he successfully preserved foodstuffs, such as soups, vegetables, juices, and even dairy, more or less.
Q. Which of the following is not used as a food preservative?
A. Sodium salt of benzoic acid
B. Sodium salt of sorbic acid
C. Sodium salt of propanoic acid
D. Sodium salt of palmitic acid
Answer: d)
- Food preservatives are widely used in the food industry and are very cheap ingredients that are used against a wide range of food spoilage organisms. Food preservatives include compounds such as benzoic acid, sodium benzoate, nitrites, sulfites, sodium sorbate, sodium propanoate and potassium sorbate.
- Sodium salt of palmitic acid or sodium palmate is not a food preservative. It is used as the base ingredient in the formation of various cosmetic products and soaps.
Q. Potassium metabisulfite is a/an
A. Preservative
B. Antioxidant
C. Artificial sweetener
D. Both A and b
Answer: A)
Potassium metabisulfite, also known as the food additive E224 or potassium pyrosulfate, is a food preservative which preserves the natural colour of food and protect against bacteria.
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