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The microbial source for citric acid is...

The microbial source for citric acid is

A

Aspergillus niger

B

Acetobacter acetic

C

Clostridium butylicum

D

Lactobacillus acidophilus

Text Solution

AI Generated Solution

The correct Answer is:
To determine the microbial source for citric acid, we will analyze the given options one by one. 1. **Aspergillus niger**: - This is a type of fungus known for its ability to produce citric acid. - The production of citric acid occurs through anaerobic fermentation, which means it takes place in the absence of oxygen. - Aspergillus niger is indeed used in the industrial production of citric acid, making this option correct. 2. **Acetobacter acetic**: - This bacterium is primarily involved in the production of acetic acid, which is the main component of vinegar. - It converts ethanol (found in wine) into acetic acid, but it does not produce citric acid. - Therefore, this option is incorrect. 3. **Clostridium butylicum**: - This is a gram-positive bacterium that is known for producing butyric acid. - It does not have a role in the production of citric acid. - Thus, this option is also incorrect. 4. **Lactobacillus acidophilus**: - This bacterium is commonly found in the human intestine and is known for producing lactic acid. - It is not involved in the production of citric acid. - Hence, this option is incorrect as well. After evaluating all the options, we conclude that the correct microbial source for citric acid is **Aspergillus niger**. ### Final Answer: The microbial source for citric acid is **Aspergillus niger**. ---
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