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Microbes in Human Welfare

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

The common nitrogen -fixer in paddy field is 

  • Rhizobium

  • Azopirillum

  • Oscillatoria

  • Frankia


B.

Azopirillum

Azopirillum is a nitrogen-fixing bacterium in paddy fields. It is very useful soil and root bacterium. It is an associative symbiotic N2 -fixing bacteria. When it is added to the soil, it multiplies in millions and can supply 20-40 kg of nitrogen per hectare per season. It also produces growth promoting substance like Indole Acetic acid (IAA). Gibberellins and promotes root proliferation. These substances improve the plant growth and yield.

Azopirillum is a nitrogen-fixing bacterium in paddy fields. It is very useful soil and root bacterium. It is an associative symbiotic N2 -fixing bacteria. When it is added to the soil, it multiplies in millions and can supply 20-40 kg of nitrogen per hectare per season. It also produces growth promoting substance like Indole Acetic acid (IAA). Gibberellins and promotes root proliferation. These substances improve the plant growth and yield.

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Which bacterium is responsible for the formation of curd from milk?

Lactobacillus  (Lactic acid bacteria).
2900 Views . 6 Shares

Give the source of invertase enzyme (sucrase).

Saccharomyces cerevisiae 
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What is brewing ?

Brewing is a complex fermentation process, which involves the production of malt beverages such as beer, ale and stout. Saccharomyces cerevisiae is used for the process of fermentation.
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What is the difference between rum and whisky ?

Rum is obtained by the fermention of  sugarcane juice or molasses. It is fermented for a shorter period of time
while
whisky is obtained by fermentation of grains like wheat, corn,barley and rye. The fementation is done for a longer period of time.
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Name one micro-organism which is used in bakery.

Yeast .
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