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Question (21)

QN002971

Which of the following is a harmful effect of microbes?

(A) Preparation of curd
(B) Production of antibiotics
(C) Food spoilage
(D) Nitrogen fixation

Correct Answer: C

Explanation:

Microbes can spoil food.

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Question (22)

QN002972

Food gets spoiled faster during summer mainly because microorganisms:

(A) grow faster in warm conditions
(B) stop growing in heat
(C) disappear completely
(D) become inactive in moisture

Correct Answer: A

Explanation:

Warm conditions favour microbial growth.

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Question (23)

QN002973

Which method helps preserve food by removing water content?

(A) Fermentation
(B) Drying
(C) Vaccination
(D) Germination

Correct Answer: B

Explanation:

Drying removes moisture needed for microbial growth.

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Question (24)

QN002974

Salting and sugaring help preserve food mainly because they:

(A) increase microbial growth
(B) reduce moisture available to microbes
(C) add oxygen to food
(D) cool the food instantly

Correct Answer: B

Explanation:

Salt and sugar reduce available moisture.

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Question (25)

QN002975

Which of the following food items is prepared using microbial fermentation?

(A) Idli
(B) Soap
(C) Chalk
(D) Plastic

Correct Answer: A

Explanation:

Idli batter ferments due to microbes.

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Question (26)

QN002976

A doctor advises completing the full antibiotic course because stopping early may:

(A) strengthen harmful microbes
(B) increase oxygen in blood
(C) stop digestion permanently
(D) remove immunity completely

Correct Answer: A

Explanation:

Incomplete antibiotic use may strengthen microbes.

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Question (27)

QN002977

Which microorganism is used in making vinegar?

(A) Amoeba
(B) Bacteria
(C) Mushroom
(D) Virus

Correct Answer: B

Explanation:

Certain bacteria are used in vinegar production.

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Question (28)

QN002978

If 2 litres of milk produce 400 g curd, approximately how much curd can be prepared from 10 litres of milk under similar conditions?

(A) 800 g
(B) 1200 g
(C) 2000 g
(D) 4000 g

Correct Answer: C

Explanation:

400 × 5 = 2000 g.

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Question (29)

QN002979

Which statement correctly explains the importance of microbes in agriculture?

(A) They only spoil crops
(B) Some microbes increase soil fertility
(C) All microbes destroy roots
(D) Microbes reduce nitrogen in soil

Correct Answer: B

Explanation:

Some microbes improve soil fertility.

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Question (30)

QN002980

Compost formation from kitchen waste mainly depends on:

(A) sunlight only
(B) microbial decomposition
(C) evaporation
(D) freezing

Correct Answer: B

Explanation:

Microorganisms decompose kitchen waste.

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Question (21)

Which of the following is a harmful effect of microbes?

Explanation:

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Question (22)

Food gets spoiled faster during summer mainly because microorganisms:

Explanation:

Link:

Question (23)

Which method helps preserve food by removing water content?

Explanation:

Link:

Question (24)

Salting and sugaring help preserve food mainly because they:

Explanation:

Link:

Question (25)

Which of the following food items is prepared using microbial fermentation?

Explanation:

Link:

Question (26)

A doctor advises completing the full antibiotic course because stopping early may:

Explanation:

Link:

Question (27)

Which microorganism is used in making vinegar?

Explanation:

Link:

Question (28)

If 2 litres of milk produce 400 g curd, approximately how much curd can be prepared from 10 litres of milk under similar conditions?

Explanation:

Link:

Question (29)

Which statement correctly explains the importance of microbes in agriculture?

Explanation:

Link:

Question (30)

Compost formation from kitchen waste mainly depends on:

Explanation:

Link:

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