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Class 10 Biology Chapter 1 Human Digestive System: Important MCQs and Tips

The Human Digestive System is the first chapter of Class 10 Biology and one of the most scoring. It explains how food is broken down, absorbed and used by the body, from the mouth to the large intestine, together with the role of the liver, pancreas and digestive enzymes, and common disorders of the digestive tract. Questions are mostly factual, so a clear picture of the organs and their functions can earn you full marks in the MCQ section.

In this post you will find the key topics to revise, quick exam tips, and eight practice MCQs taken from our 150-MCQ chapter test. Try them honestly before looking at the answers.

Key topics to revise

  • The alimentary canal in order: oral cavity, pharynx, oesophagus, stomach, small intestine and large intestine.
  • Digestive enzymes, where they are produced and what they act on (amylase, pepsin, trypsin, lipase).
  • Role of the liver and bile, and of the pancreas.
  • Structure of villi and absorption of digested food.
  • Peristalsis and the movement of food.
  • Disorders such as ulcers, diarrhoea, constipation and their causes.

Exam tips

  1. Make a table of enzyme, source, substrate and product; most MCQs come straight from it.
  2. Learn the exact names of the parts of the small intestine and the stomach.
  3. Read the textbook diagrams; many MCQs ask which part does what.
  4. Pay attention to words like 'first', 'main' and 'only' in the question.

Practice MCQs

Q1. The three portions of the small intestine, in the correct order, are:

  • (a) Ileum, duodenum, jejunum
  • (b) Duodenum, jejunum, ileum
  • (c) Colon, caecum, rectum
  • (d) Caecum, colon, rectum

Q2. Which group of enzymes breaks up starches?

  • (a) Pepsin
  • (b) Lipases
  • (c) Proteases
  • (d) Amylases

Q3. The enzyme trypsin is found in:

  • (a) Gastric juice
  • (b) Saliva
  • (c) Bile
  • (d) Pancreatic juice

Q4. Which group consists only of accessory digestive organs?

  • (a) Pharynx, oesophagus, stomach
  • (b) Duodenum, jejunum, ileum
  • (c) Stomach, liver, pancreas
  • (d) Salivary glands, liver, pancreas

Q5. The three parts of the large intestine are:

  • (a) Caecum, colon and rectum
  • (b) Duodenum, jejunum and ileum
  • (c) Colon, ileum and anus
  • (d) Caecum, ileum and rectum

Q6. The duodenum is about:

  • (a) 4 m long
  • (b) 7 m long
  • (c) 25 cm long
  • (d) 2.5 m long

Q7. Hydrochloric acid in the stomach also:

  • (a) Breaks fats into droplets
  • (b) Kills pathogenic bacteria in food
  • (c) Neutralizes chyme
  • (d) Digests starch

Q8. The part of the stomach just before the small intestine is called:

  • (a) Cardiac end
  • (b) Pyloric end
  • (c) Cardiac sphincter
  • (d) Rectum

Answers

  1. (b) Duodenum, jejunum, ileum
  2. (d) Amylases
  3. (d) Pancreatic juice
  4. (d) Salivary glands, liver, pancreas
  5. (a) Caecum, colon and rectum
  6. (c) 25 cm long
  7. (b) Kills pathogenic bacteria in food
  8. (b) Pyloric end

How to use these MCQs

Do not just read the answers. Cover them, attempt all eight questions within eight minutes, then check. For every wrong answer, open your textbook and read that paragraph again. Students who practise this way usually find that the same mistakes do not repeat in the board exam. Once you are comfortable with these, move on to a full timed test so that you can judge your preparation for the whole chapter of Human Digestive System, not just a few questions.

Practise the full chapter

These questions are only a small part of our complete Human Digestive System test. The full test has 150 MCQs, starting with all exercise MCQs from the textbook followed by carefully checked questions covering every topic of the chapter. You get an instant score, a full answer review, a printable result and up to three attempts in seven days.

Good luck with your preparation, from the Student Hub Pakistan team.