Conversion of sugar into alcohol during fermentation is due to the direct action of

Which one of the following is not true about antibiotics?

Penicillin inhibits bacterial multiplication because it

Pollution from animal excreta and organic waste from kitchen can be most profitably minimised by

Organic farming is the technique of raising crops through use of

Yogurt and butter milk are produced with the use of

Which one of the micro-organism is used for production of citric acid in industries?

Which one of the following is used in the manufacture of alcohol ?

Some blue green algae can be used as bio-fertilizer as they are

Which of the following plants are used as green manure in crop fields and in sandy soils