Nitrifying bacteria from Biology Microbes in Human Welfare Class 12 Nagaland Board
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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

Nitrifying bacteria

  • convert free nitrogen to nitrogen compounds

  • convert proteins into ammonia

  • reduce nitrates to free nitrogen 

  • oxidise ammonia to nitrates


D.

oxidise ammonia to nitrates

The outermost cell layer of the endosperm (3n) of seed is called aleurone layer. Since the cells of aleurone layer are triploid, the number of chromosomes would be = 63, as root tip cells (2n) has 42 chromosomes.

The outermost cell layer of the endosperm (3n) of seed is called aleurone layer. Since the cells of aleurone layer are triploid, the number of chromosomes would be = 63, as root tip cells (2n) has 42 chromosomes.

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

Lactobacillus  (Lactic acid bacteria).
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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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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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Give the source of invertase enzyme (sucrase).

Saccharomyces cerevisiae 
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