What is the role of enzymes in the human body?

D. They help in digestion of food

A. They produce electrical signals in nerves

B. They transport oxygen in the blood

C. They provide structural support to bones

D. They help in digestion of food

What is the main function of the esophagus in the digestive system?

B. Moves food from throat to stomach

D. Stores bile for fat digestion

Which of the following is/are function/s of stomach?

A. Mechanical digestion of food

B. Chemical digestion of proteins

C. Killing harmful microorganisms

Everyday Science · Body Systems (Human Biology) · page 18 of 19

Digestive System MCQs with Answers

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Digestive System MCQs (171–180)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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171.
Where is pepsinogen converted into pepsin?
Correct Answer: A. Stomach
One-liner
Pepsinogen is converted into pepsin in the stomach by the action of hydrochloric acid (HCl).
172.
Food is assimilated into the body from digestive tract in ?
Correct Answer: B. Small intestine
One-liner
Food is assimilated into the body from the digestive tract in the small intestine.
173.
Past Paper MCQ
Duodenum and Jejunum are parts of the _?
Correct Answer: B. Small intestine
One-liner
Duodenum and Jejunum are parts of the small intestine.
174.
What is the role of enzymes in the human body?
Correct Answer: D. They help in digestion of food
One-liner
Enzymes are biological catalysts that help in digestion of food by breaking down complex food molecules into simpler absorbable forms.
175.
What is the substrate of salivary amylase?
Correct Answer: B. Starch
One-liner
The substrate of salivary amylase is starch.
176.
In human body, Gall Bladder is part of the system?
Correct Answer: A. Digestive
One-liner
The gall bladder is part of the Digestive system.
177.
What is the main function of the esophagus in the digestive system?
Correct Answer: B. Moves food from throat to stomach
One-liner
The main function of the esophagus is to move food from the throat to the stomach through rhythmic muscular contractions called peristalsis.
178.
What is the pH range of enterokinase activity?
Correct Answer: C. 7–8
One-liner
Enterokinase is most active at a slightly alkaline pH range of 7–8.
179.
Which of the following is/are function/s of stomach?
Correct Answer: D. All of these
One-liner
The stomach performs multiple functions including mechanical digestion, chemical digestion of proteins, and killing harmful microorganisms, so the correct answer is All of these.
180.
Which enzyme is responsible for converting milk into casein?
Correct Answer: B. Renin
One-liner
The enzyme responsible for converting milk into casein is renin (also known as chymosin).

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Digestive System MCQs with Answers

Digestive System MCQs (171–180)

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