Question

Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer. Biogas, citric acid, penicillin and curd.

Answer 1

Penicillin > Biogas> curd > citric acid.

Penicillin is an antibiotic which acts against bacterial infection . It has the highest welfare of human society since it acts against illness. It is used to treat various infections caused by bacteria such as ear infection. Next comes is Biogas, it is an alternative for energy source from biological origin, to prepare and cook food. It is prepared from abmixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Also it doesn't put harm to the environment. Curd is prepared by the action of lactic acid bacteria on milk. They breakdown protein casein present in the milk. It is good for health and acts as probiotics because the bacteria present in the curd are good for health of the body. Then last is citric acid. Citric acid is a weak organic acid found in citrus fruits. It is a natural preservative and is also used to add an acidic (sour) taste to foods and soft drinks. In biochemistry, it is important as an intermediate in the citric acid cycle and therefore occurs in the metabolism of almost all living things.