Micro-organisms that grow in milk and convert it to curd are commonly called _________.
Microbes such as Lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it into curd.
Ethanol is commercially produced through a particular species of _________.
Saccharomyces is a yeast that is used to ferment sugar to produce ethanol in absence of oxygen or by anaerobic respiration.
The puffed-up appearance of dough is due to production of?
Which of the following bacterium produces butyric acid?
The most common fungal partners of mycorrhiza are _________ species.
Yeast is used in the production of:
Yeast is used in the production of alcohol, wine-making and in baking bread.
Which of the followings is also called sac fungi that live parasitically and in various habitats?
Ascomycetes are called sac fungi that live parasitically and in various habitats. They are responsible for a number of fungal diseases in plants.
On which of the following factors does the type of gas produced depend?
The type of gas produced depends upon the microbes and the organic substrates they utilise.
Example: In the fermentation of dough, cheese making and production of beverages, the main gas produced is CO2.
First organic acid produced by microbial fermentation is _________.
Vinegar is obtained from molasses with the help of:
Vinegar is chemically diluted acetic acid which is produced by fermentation molasses in presence of Yeast and Acetobacter.
Treatment of wastewater is done by:
Which of the following crop has been developed by genetic engineering in India?
Which of the following is not correct regarding the primary treatment of wastewater?
Which of the followings is mainly produced by the activity of anaerobic bacteria on sewage?
Secondary treatment of sewage is also called _________.
Secondary treatment of sewage is also called biological treatment because in this treatment aeration of sewage water is done that increase the microbes that decompose the organic materials in sewage water.
High value of BOD shows?
Which of the following is a gram-negative bacterium?
Escherichia coli is a gram-negative bacterium. The bacterium that does not retain the gram stain is called gram-negative bacteria.
The common nitrogen-fixer in paddy fields is _________.
The most important of the symbiotic nitrogen-fixing bacteria which forms nodules on the roots of legume plants is _________.
Rhizobium is a nitrogen-fixing bacteria found in the nodule of a leguminous plant's root. It increases the fertility of the soil.
Which of the following organisms not fix atmospheric nitrogen?
Organisms called Methanogens are most abundant in a _________.
Baculoviruses are pathogens that:
Assertion: Biofertilizers are organisms that enrich the nutrient quality of the soil.
Reason: Organic farming is the farming technique in which no chemical is used as fertilizers or insecticides.
Both assertion and reason are correct statements but the reason is not the correct explanation of the assertion. So option D is correct.
The main source of bio-fertilizers is/are:
Bio-fertilizer enriches the nutrient in the soil. The main sources of bio-fertilizers are bacteria, fungi and cyanobacteria.
In which of the following microbes are not used extensively?
I. Converting milk into curd.
II. Making cheese of different flavour and taste.
III. Production of anti-viral drugs.
IV. Production of antibiotics.
V. As bio-fertilizers.
VI. Production of inorganic fertilizers.