Respiration in Biology MCQs App | IGCSE O Level Biology MCQs e-Book PDF
IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology MCQs – Practice Test 1 (Chapter 15)

Respiration in Biology MCQs with Answers PDF Download – Test 1

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Respiration in Biology MCQs with Answers PDF Download: MCQ Quiz 1

MCQ 1: Wastes of aerobic respiration (with O2) includes:

  1. carbon dioxide
  2. lactic acid
  3. ethanol
  4. energy

MCQ 2: Air pressure in thorax increases in:

  1. anaerobic respiration
  2. inspiration
  3. expiration
  4. digestion

MCQ 3: Front of the ribs are attached to the:

  1. diaphragm
  2. sternum
  3. external intercostal muscles
  4. internal intercostal muscles

MCQ 4: Air inhaled in addition to the tidal air is called:

  1. complemental air
  2. residual air
  3. supplemental air
  4. saturated air

MCQ 5: Dry mass is lost through:

  1. lenticels
  2. respiration
  3. stomata
  4. limiting factor of enzymes

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