What is Respiration MCQs Quiz Online PDF Download

Practice what is respiration MCQs, O level biology MCQ test for online learning. Respiration in biology quiz has multiple choice questions (MCQ), what is respiration quiz questions and answers to practice as air pressure in thorax increases in, answer key help with choices as anaerobic respiration, inspiration, expiration and all of these problem solving for viva, competitive exam preparation, interview questions. Free study guide is for online learning what is respiration quiz with MCQs to practice test questions with answers.

MCQs on What is Respiration Quiz PDF Download

MCQ. Air pressure in thorax increases in

  1. anaerobic respiration
  2. inspiration
  3. expiration
  4. all of these


MCQ. Blood entering the lungs contain

  1. very little oxygen (O2)
  2. very high carbon dioxide (CO2)
  3. vary low carbon dioxide (CO2)
  4. both A and B


MCQ. In expiration

  1. the diaphragm relaxes and arches upwards
  2. air enters the lungs
  3. ribs move upwards
  4. sternum moves up and away from backbone


MCQ. Stimulus for breathing is

  1. lack of oxygen in blood
  2. excess of carbon dioxide in blood
  3. contraction of alveoli
  4. diaphragm movements


MCQ. In anaerobic respiration (without O2) in mammals, the wastes are

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