Citric Acid Production MCQ:

1. Who first isolated citric acid?

1) Carl Wilhelm

2) Thomas Edison

3) Charles Darwin

4) Francis Crick

Answer: 1

2. Who discovered the citric acid cycle?

1) Hans Krebs

2) Carl Wilhelm

3) Wehmer

4) Adam

Answer: 1

3. Who observed citric acid as a by-product of calcium oxalate produced by Penicillium glaucum?

1) Thomas Edison

2) Carl Wilhelm

3) Wehmer

4) Adam

Answer: 3

4. Citric acid cycle occurs in _____________

1) Nucleus

2) Golgi apparatus

3) Mitochondria

4) Chloroplast

Answer: 3

5. Which of the following is the most common method for citric acid production?

1) Solid-state fermentation

2) Surface fermentation

3) Surface adhesion fermentation

3) Submerged fermentation

Answer: 4

6. Which of the following organisms is not used for the production of citric acid?

1) Aspergillus wentii

2) Bacillus licheniformis

3) Candida oleophila

4) Saccharomyces cerevisiae

Answer: 4

7. Which of the following is used to precipitate calcium citrate.

1) Magnesium hydroxide

2) Calcium hydroxide

3) Sulfur hydroxide

4) None of these

Answer: 2

8. The optimum temperature required for the citric acid production by fermentation is_______

1) 40°C

2) 30°C

3) 20°C

4) 10°C

Answer: 2

9. Which of the following factor can affect the citric acid production______

1) pH & Temperature

2) Nutrients Conc.

3) Area & Agitation

4) All of these

Answer: 4

10. Which of the following microorganism is used for the commercial production of citric acid?

1) Aspergillus  Niger

2) Bacillus licheniformis

3) Candida oleophila

4) Saccharomyces cerevisiae

Answer: 1