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Question (11)

QN002931

Spirulina contains protein amounting to more than approximately:

(A) 10%
(B) 25%
(C) 40%
(D) 60%

Correct Answer: D

Explanation:

Spirulina contains more than 60% protein.

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Question (12)

QN002932

Microorganisms are useful in decomposition because they:

(A) produce sunlight
(B) break down dead organic matter
(C) stop plant growth
(D) prevent respiration

Correct Answer: B

Explanation:

Microorganisms decompose dead organic matter.

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Question (13)

QN002933

Which of the following is NOT a microorganism?

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

Correct Answer: D

Explanation:

A dog is visible to the naked eye.

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Question (14)

QN002934

A microorganism that can prepare food using sunlight is most likely:

(A) algae
(B) virus
(C) fungi
(D) protozoa

Correct Answer: A

Explanation:

Algae prepare food by photosynthesis.

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Question (15)

QN002935

Which condition is most suitable for rapid growth of yeast in dough?

(A) Ice-cold water
(B) Warm and moist conditions
(C) Dry conditions
(D) Very high temperature

Correct Answer: B

Explanation:

Yeast grows rapidly in warm and moist conditions.

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Question (16)

QN002936

If one yeast cell divides into 2 cells every hour, how many yeast cells will be present after 4 hours starting from one cell?

(A) 4
(B) 8
(C) 16
(D) 32

Correct Answer: C

Explanation:

1 → 2 → 4 → 8 → 16.

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Question (17)

QN002937

A dough sample rises faster after adding sugar because sugar:

(A) kills yeast cells
(B) provides food to yeast
(C) removes water from dough
(D) reduces respiration

Correct Answer: B

Explanation:

Sugar provides energy for yeast growth.

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Question (18)

QN002938

Which of the following microorganisms is mainly responsible for converting milk into curd?

(A) Lactobacillus
(B) Amoeba
(C) Yeast
(D) Virus

Correct Answer: A

Explanation:

Lactobacillus changes milk into curd.

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Question (19)

QN002939

A student leaves cooked food uncovered during summer. After a few hours, the food smells bad mainly due to:

(A) evaporation
(B) microbial growth
(C) cooling effect
(D) sunlight reflection

Correct Answer: B

Explanation:

Microorganisms spoil food.

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Question (20)

QN002940

Which statement correctly defines microorganisms?

(A) Organisms visible only at night
(B) Organisms too small to be seen without magnification
(C) Organisms living only in water
(D) Organisms without cells

Correct Answer: B

Explanation:

Microorganisms require magnification to be seen.

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Question (11)

Spirulina contains protein amounting to more than approximately:

Explanation:

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Question (12)

Microorganisms are useful in decomposition because they:

Explanation:

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Question (13)

Which of the following is NOT a microorganism?

Explanation:

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Question (14)

A microorganism that can prepare food using sunlight is most likely:

Explanation:

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Question (15)

Which condition is most suitable for rapid growth of yeast in dough?

Explanation:

Link:

Question (16)

If one yeast cell divides into 2 cells every hour, how many yeast cells will be present after 4 hours starting from one cell?

Explanation:

Link:

Question (17)

A dough sample rises faster after adding sugar because sugar:

Explanation:

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Question (18)

Which of the following microorganisms is mainly responsible for converting milk into curd?

Explanation:

Link:

Question (19)

A student leaves cooked food uncovered during summer. After a few hours, the food smells bad mainly due to:

Explanation:

Link:

Question (20)

Which statement correctly defines microorganisms?

Explanation:

Link:

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