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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

A person likely to develop tetanus is immunised by administering

• preformed antibodies

• wide spectrum antibiotics

• weakened germs

B.

preformed antibodies

In passive immunity, the antibodies are produced in some other organism (eg, horse) in response to the given antigen,.These antibodies are then injected into the human body at the time of need. This is known as inoculation, eg, persons infected by tetanus, rabies, Salmonella and snake venom are given the sufficient amount of antibodies, so that they can survive.

In passive immunity, the antibodies are produced in some other organism (eg, horse) in response to the given antigen,.These antibodies are then injected into the human body at the time of need. This is known as inoculation, eg, persons infected by tetanus, rabies, Salmonella and snake venom are given the sufficient amount of antibodies, so that they can survive.

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Name one micro-organism which is used in bakery.

Yeast .
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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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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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