Human Respiratory SystemPractice Questions & MCQs
Practice Human Respiratory System questions from Life Processes (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Human Respiratory SystemQuiz - Solve & Score
Q1. Why is the surface of the lungs folded into millions of alveoli?
- A.to store more air permanently
- B.to maximise the area for gas exchange
- C.to make the lungs heavier
- D.to filter the blood
Answer: B. to maximise the area for gas exchange
Q2. Consider the following statements about the respiratory system: (I) Gas exchange occurs in the alveoli. (II) Haemoglobin carries oxygen. (III) The trachea has no cartilage support. Which of the above statement(s) is/are correct?
- A.None of these
- B.Only III
- C.Only I
- D.Only I and II
Answer: D. Only I and II
NCERT fact (biology, chapter 'Life Processes'): Correct: I, II. Why option D fits - Correct. Distractor analysis: option A) 'None of these' misses the point - Re-check each statement individually; option B) 'Only III' misses the point - Re-check each statement individually. Final answer - D) Only I and II.
Q3. Cellular respiration uses the oxygen delivered by breathing to:
- A.make glucose
- B.digest proteins
- C.release energy from glucose
- D.produce chlorophyll
Answer: C. release energy from glucose
To see why, recall that An ionic bond forms when a metal donates electrons to a non-metal: e.g. Na -> Na+ + e-, Cl + e- -> Cl-, and Na+ + Cl- -> NaCl; the resulting solid is held by strong electrostatic attraction => this fixes the property asked in the stem; hence the answer = release energy from glucose. That fits the listed correct option directly - Correct. As for the rest: option A) 'make glucose' fails since Glucose is broken down, not made, in respiration; option B) 'digest proteins' doesn't hold - It releases energy from glucose. Hence the answer is C) release energy from glucose.
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Where can I practise Human Respiratory System questions for Class 10 Science?
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Are these Human Respiratory System questions important for the exam?
Yes. These Human Respiratory System important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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Every Human Respiratory System question on RankByte comes with the correct answer and a full step-by-step solution, so you learn the concept instead of just guessing.