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Question (1)

QN001461

Which of the following is the correct definition of digestion?

(A) Intake of food by animals
(B) Breaking down of complex food into simpler forms
(C) Removal of waste from the body
(D) Mixing of food with blood

Correct Answer: B

Explanation:

Digestion is the process of breaking complex food into simpler forms.

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Question (2)

QN001462

Which part of the human digestive system is the starting point of digestion?

(A) Stomach
(B) Small intestine
(C) Mouth
(D) Oesophagus

Correct Answer: C

Explanation:

Digestion begins in the mouth.

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Question (3)

QN001463

Which process in the mouth is called mechanical digestion?

(A) Absorption
(B) Swallowing
(C) Crushing and chewing food
(D) Egestion

Correct Answer: C

Explanation:

Crushing and chewing food is called mechanical digestion.

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Question (4)

QN001464

A student chews boiled rice for one minute and notices a sweet taste. What is the most appropriate reason?

(A) Proteins changed into sugar
(B) Fats dissolved in saliva
(C) Starch was broken into sugar by saliva
(D) Rice absorbed water from the mouth

Correct Answer: C

Explanation:

Saliva breaks starch into sugar, giving a sweet taste.

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Question (5)

QN001465

Which nutrient present in chapati begins digestion in the mouth?

(A) Protein
(B) Fat
(C) Vitamins
(D) Starch

Correct Answer: D

Explanation:

Starch digestion begins in the mouth.

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Question (6)

QN001466

Saliva mainly helps in the digestion of

(A) proteins
(B) starch
(C) fats
(D) minerals

Correct Answer: B

Explanation:

Saliva contains digestive juice that acts on starch.

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Question (7)

QN001467

A child swallows food without chewing properly. Which process becomes less effective first?

(A) Absorption
(B) Respiration
(C) Mechanical digestion
(D) Egestion

Correct Answer: C

Explanation:

Chewing is part of mechanical digestion.

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Question (8)

QN001468

Which statement about saliva is correct?

(A) It makes food hard and dry
(B) It stops digestion in the mouth
(C) It moistens food and helps digest starch
(D) It only helps in tasting food

Correct Answer: C

Explanation:

Saliva moistens food and starts starch digestion.

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Question (9)

QN001469

Two test tubes contain boiled rice. In one test tube, the rice was chewed before adding iodine solution. Which observation is expected?

(A) Both turn deep blue-black
(B) Only chewed rice turns deep blue-black
(C) Unchewed rice turns blue-black strongly
(D) Neither changes colour

Correct Answer: C

Explanation:

Unchewed rice still contains more starch.

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Question (10)

QN001470

Iodine solution turns blue-black in the presence of

(A) protein
(B) starch
(C) sugar
(D) fat

Correct Answer: B

Explanation:

Iodine gives blue-black colour with starch.

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Question (1)

Which of the following is the correct definition of digestion?

Explanation:

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Question (2)

Which part of the human digestive system is the starting point of digestion?

Explanation:

Link:

Question (3)

Which process in the mouth is called mechanical digestion?

Explanation:

Link:

Question (4)

A student chews boiled rice for one minute and notices a sweet taste. What is the most appropriate reason?

Explanation:

Link:

Question (5)

Which nutrient present in chapati begins digestion in the mouth?

Explanation:

Link:

Question (6)

Saliva mainly helps in the digestion of

Explanation:

Link:

Question (7)

A child swallows food without chewing properly. Which process becomes less effective first?

Explanation:

Link:

Question (8)

Which statement about saliva is correct?

Explanation:

Link:

Question (9)

Two test tubes contain boiled rice. In one test tube, the rice was chewed before adding iodine solution. Which observation is expected?

Explanation:

Link:

Question (10)

Iodine solution turns blue-black in the presence of

Explanation:

Link:

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