Class VIII - Story of Micro Organisms

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Prepared by Sri Dilip, M.Sc., B.Ed., TGT - Science

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Some of the Micro Organisms treated as farmer friendly because

1 piste

a) they increase the flowering in plants

b) they increase soil fertility

c) they increase soil fertility

d) Non of the above

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Curd or buttermilk contains the bacterium named

1 piste

a)Lactobacillus

b) Cocci Bacteria

c) Xanthomonas Citri

d) Fermented Food

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Which of the following is fermented food item

1 piste

a) Rice

b) Puri

c) Idly & Dosa

d) Upma

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When yeast is added to the dough for preparing bread and bakery items, the dough rises. This is due to

1 piste

a) Production of Hydrogen gas

b) Production of Nitrogen gas

c) Production of Oxygen gas

d) Production of Carbondioxide gas

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The process of conversion of sugars into Alcohol by yeast is known as

1 piste

a) Fermentation

b) Decantation

c) Evaporation

d) Condensation

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Produced in sugar industry is used in the preparation of ethylalcohol by adding yeast for fermentation process

1 piste

a)Bagasse

b) Molasses

c) Sugar Crystals

d) Cane Sugar Juice

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Some medicines that kill the bacteria involved in certain diseases are called

1 piste

a) Antibodies

b) Anaesthetic

c) Antibiotics

d) Insecticides

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In which of the following items yeast can grow

1 piste

a) Barley

b) Wheat

c) Rice

d) Crushed fruit juices

e) All of the above

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If we use antibiotics without consulting a qualified doctor or unnecessary use of antibiotics cause

1 piste

a) Harm to our body

b) Affects blood cells which fight against infections

c) Sometimes they may kill useful bacteria too

d) All of the above

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The antibiotic "Penicillin" was invented by

1 piste

a) Alexander flemming

b) Jonas Salk

c) Edward Jenner

d) Ronald Ross

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Lähetä

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