Useful and Harmful Microbes - Maharashtra Board STD 9 Science Questions - Vidyadip

Question types

Useful and Harmful Microbes question types

137 questions across 11 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

137

Questions

11

Question groups

5

Question types

Write the Correct Alternative.

Find the odd one out.

Write the following Statement Is True Or False. & Write True Statement.

Answer the following in one sentece.

Answer the following questions in detail.

complete the Graph/Table.

Answer the following question.

Give Scientific Reason.

Answer the following question.

Fill In The Blanks.

Match The Columns/pair.

Sample Questions

Useful and Harmful Microbes questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1Write the Correct Alternative.1 Mark

……………………. can grow and reproduce only in living cells.

A
Bacteria
✓
Viruses
C
Fungi
D
Protozoa

Answer: B.

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Q 2Write the Correct Alternative.1 Mark

The bacteria which spoil cooked food are ……………………. .

A
Saccharomyces
B
Lactobacilli
✓
Clostridium
D
Rhizobium

Answer: C.

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Q 3Write the Correct Alternative.1 Mark

A yeast ……………………. is used to absorb the toxins released during the production of palm oil.

✓
Yarrowia lipolytica
B
Alcanivorax
C
Saccharomyces cerevisiae
D
Penicillium

Answer: A.

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Q 4Write the Correct Alternative.1 Mark

Molasses is fermented with the help of yeast called ……………………. .

A
Yarrowia lipolytica
B
Alcanivorax
C
Rhizobia
✓
Saccharomyces

Answer: D.

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Q 5Write the Correct Alternative.1 Mark

During fermentation, yeast cells convert carbohydrates into ……………………. .

A
glucose and fructose
✓
alcohol and carbon dioxide
C
proteins and fats
D
fatty acids and amino acids

Answer: B.

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Q 6Find the odd one out.1 Mark

Root rot, rust (tambura), rubella, mozaic.

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Q 7Find the odd one out.1 Mark

Lactobacilli, rhizobia, yeast, clostridia.

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Q 8Find the odd one out.1 Mark

Pneumonia, diphtheria, chicken pox, cholera.

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Q 9Find the odd one out.1 Mark

Tetracycline, Penicillin, Gentamycin, Erythromycin.

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Q 10Find the odd one out.1 Mark

Ampicillin, Amoxycillin, Penicillin, Tetracycline.

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Q 11Write the following Statement Is True Or False. & Write True Statement.1 Mark

Ida Bengston was honoured with the Typhoid Medal’ in 1947.

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Q 12Write the following Statement Is True Or False. & Write True Statement.1 Mark

Chicken pox spread due to contaminated food and water.

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Q 13Write the following Statement Is True Or False. & Write True Statement.1 Mark

Pneumonia is spread through droplets spread in air by infected person.

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Q 14Write the following Statement Is True Or False. & Write True Statement.1 Mark

Dandruff and ringworm are caused by fungi.

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Q 15Write the following Statement Is True Or False. & Write True Statement.1 Mark

Dengue is caused by a bacteria.

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Q 16Answer the following in one sentece.1 Mark

Leguminous plants can produce more proteins due to …………………….. .

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Q 17Answer the following in one sentece.1 Mark

Toxins of fungal origin are called …………………….. .

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Q 18Answer the following in one sentece.1 Mark

Yeast reproduces asexually by the …………………….. method.

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Q 19Answer the following in one sentece.1 Mark

Clostridium bacteria produce bottle-shaped endospores.

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Q 20Answer the following in one sentece.1 Mark

Ethanol is produced by the fermentation of molasses.

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Q 21Answer the following questions in detail.2 Marks

Write down the modes of infection and the preventive measures against fungal diseases.

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Q 22Answer the following questions in detail.2 Marks

What are the modes of infection and preventive measures for Influenza.

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Q 23Answer the following questions in detail.2 Marks

What are the modes of infection and preventive measures for Hepatitis?

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Q 24Answer the following questions in detail.2 Marks

Write down the modes of infection and preventive measures for leprosy.

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Q 25Answer the following questions in detail.2 Marks

Write down the modes of infection and preventive measures against Pneumonia.

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Q 26complete the Graph/Table.3 Marks

:Different species of Clostridium bacteria and the diseases caused by them.

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Q 27Answer the following question.3 Marks

Short Note On : Clostridium.

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Q 28Answer the following question.3 Marks

Short Note On : Bio-remediation.

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Q 29Answer the following question.3 Marks

Short Note On : Rhizobial inoculation.

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Q 30Answer the following question.3 Marks

What is meant by microbes? What are their characteristics?

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Q 31Answer the following question.3 Marks

What is the structure of lichen, a condiment? Where else is it used?

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Q 32Give Scientific Reason.3 Marks

Food on which fungi has grown cannot be eaten.

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Q 33Give Scientific Reason.3 Marks

Cotton fabrics, gunny bags, leather items and wooden items do not last long.

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Q 34Give Scientific Reason.3 Marks

Antibiotics are not effective against common cold or influenza.

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Q 35Give Scientific Reason.3 Marks

Nowadays, seeds are coated with Rhizobial solution or powder before sowing.

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Q 36Give Scientific Reason.3 Marks

Antibiotics should be taken only when prescribed by a doctor.

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Q 37Answer the following question.5 Marks

Write the names of microbes found in the following food materials. : yogurt, bread, root nodules of leguminous plants, idli, dosa, spoiled potato curry.

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Q 38Answer the following question.5 Marks

How can we observe Rhizobium bacteria in the roots of leguminous plant?

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Q 39Answer the following question.5 Marks

What are the precautions to be followed while taking antibiotics?

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Q 40Answer the following question.5 Marks

How was the antibiotic penicillin discovered?

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Q 41Answer the following question.5 Marks

What is Penicillin? What is it used for?

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Q 42Fill In The Blanks.1 Mark

Rhizobium : Nitrogen fixation : : Clostridium : …………………………. .

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Q 43Fill In The Blanks.1 Mark

Oil spills: Alcanivorax :: Absorption of arsenic : …………………………. .

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Q 44Fill In The Blanks.1 Mark

Yoghurt: Lactobacilli : : Bread : …………………………. .

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Q 45Fill In The Blanks.1 Mark

Measles : Virus :: Ringworm : …………………………. .

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Q 46Fill In The Blanks.1 Mark

Swine flu : HJNJ : : Bird Flu : …………………………. .

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Q 47Match The Columns/pair.5 Marks

1. Rhizobium a. Food poisoning
2. Clostridium b. Nitrogen fixation
3. Penicillium c. Bakery products
4. Yeast d. Production of antibiotics

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Q 48Match The Columns/pair.5 Marks

Column ‘A’	Column ‘B’
(1) Leprosy	(a) Virus
(2) Ringworm	(b) Fungi
(3) Influenza	(c) Protozoa
(4) Malaria	(d) Bacteria

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