Biotechnology

Question: During recovery step of citric acid, calcium citrate formed is treated with which of the following acid to precipitate calcium? [A]. HCl [B]. HNO3 [C]. H2SO4 [D]. None of these Answer: Option C Explanation: No answer description available for this question.

Question: For the recovery of citric acid after fermentation, Ca(OH)2 is added to the slurry to [A]. precipitate calcium carbonate [B]. precipitate calcium citrate [C]. precipitate calcium phosphate [D]. precipitate calcium sulphate Answer: Option B Explanation: No answer description available for this question.

Question: In submerged process for the fermentation to produce citric acid, [A]. A. niger is used with solid substrate as sweet potato [B]. A. niger floats on the surface of solution [C]. Fungal mycelium grows through out the solution in a deep tank [D]. both (a) and (b) Answer: Option C Explanation: No answer description…

Question: In liquid surface culture process for the fermentation to produce citric acid, [A]. A. niger is used with solid substrate as sweet potato [B]. A. niger floats on the surface of solution [C]. Fungal mycelium grows through out the solution in a deep tank [D]. both (a) and (b) Answer: Option B Explanation: No…

Question: In koji process for the fermentation to produce citric acid, [A]. A. niger is used with solid substrate as sweet potato [B]. A. niger floats on the surface of solution [C]. Fungal mycelium grows through out the solution in a deep tank [D]. both (a) and (b) Answer: Option A Explanation: No answer description…

Question: Which of the following nitrogen sources is added in the fermentation medium of citric acid production? [A]. Ammonium salt [B]. Urea [C]. Both (a) and (b) [D]. Peptone Answer: Option C Explanation: No answer description available for this question.

Question: Ethanol is oxidized to acetic acid aerobically using [A]. Acetobacter [B]. Gluconobacter [C]. both (a) and (b) [D]. Lactobacillus Answer: Option C Explanation: No answer description available for this question.

Question: Malt vinegar is produced from [A]. fruit juices [B]. malted grain [C]. ethanol [D]. ale Answer: Option B Explanation: No answer description available for this question.

Question: Alegar is a type of vinegar produced from [A]. fruit juices [B]. malted grain [C]. ethanol [D]. ale Answer: Option D Explanation: No answer description available for this question.

Question: Cider vinegar is produced from [A]. fruit juices [B]. malted grain [C]. ethanol [D]. ale Answer: Option A Explanation: No answer description available for this question.