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Microbes in Human Welfare

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CBSE Gujarat Board Haryana Board

## Previous Year Papers

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Class 10 Class 12

Which one of the following is not a biofertilizer

• Rhizobium

• Nostoc

• Mycorrhiza

• Agrobacterium

D.

Agrobacterium

Agrobacterium is a Gram negative bacterium that causes tumours in plants. It is well known for its ability to transfer DNA between itself and plants, and for this reasin it has become an important tool for genetic engineering. A. tumefaciens causes crown-gall disease in plants. It has Ti- plasmid.

Agrobacterium is a Gram negative bacterium that causes tumours in plants. It is well known for its ability to transfer DNA between itself and plants, and for this reasin it has become an important tool for genetic engineering. A. tumefaciens causes crown-gall disease in plants. It has Ti- plasmid.

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Name one micro-organism which is used in bakery.

Yeast .
622 Views

Give the source of invertase enzyme (sucrase).

Saccharomyces cerevisiae
607 Views

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.
681 Views

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

Lactobacillus  (Lactic acid bacteria).
2900 Views

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.
587 Views