Citric acid is a natural and organic compound that is found in many citrus fruits. It is a weak organic acid and is neither a mineral, nor a vitamin, but is best for the human body. For people who suffer from kidney stones, citric acid in the diet will be so beneficial.
A good producer of citric acid is Aspergillus niger (a fungus).
For the most part, the largest application of Aspergillus Niger is the major source of citric acid in a major way. This organism accounts for over 99% of global citric acid production. Clostridium produces butyric acid, Saccharomyces cerevisiae is used for bread baking fermenting mailed cereals and fruit juices to produce ethanol. Pseudomonas (a bacterium) is used in vitamin-B12 production.
Therefore, the correct answer is option B, Aspergillus.
Answer the following questions:
1. State what do you understand by “MALT”? Where is it located inside our body?
2. Explain cytokine barriers.
3. Name the diagnostic test for AIDS. On what principle does it work?
4. Bone marrow and thymus play an important role in human immune system. Explain how are they able to achieve this.
Name an alcoholic drink which is produced with the help of microbes:
(1) With distillation
(2) Without distillation
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): A typical unfertilized, angiosperm embryo sac at maturity is 8-nucleate and 7-celled.
Reason (R): The egg apparatus has 2 polar nuclei.
In the light of the above statements, choose the correct answer from the options given below:
There are several valuable microorganisms that are beneficial to humans in various manners such as: