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MCQs

Total Questions : 78 | Page 2 of 8 pages
Question 11. The factor which does not affect the rate of alveolar diffusion is __________
  1.    Solubility of gas
  2.    Reactivity of gas
  3.    Thickness of membrane
  4.    Concentration gradient
 Discuss Question
Answer: Option B. -> Reactivity of gas
Answer: (b).Reactivity of gas
Question 12. A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This oxygen ___________
  1.    helps in releasing more oxygen to tissues
  2.    raises the pCO₂ of blood to 75mm of Hg
  3.    acts as a reserve during muscular exercise
  4.    is enough to keep oxyhemoglobin saturation at 96%
 Discuss Question
Answer: Option C. -> acts as a reserve during muscular exercise
Answer: (c).acts as a reserve during muscular exercise
Question 13. The urge to inhale in humans results from _________
  1.    Rising pCO₂
  2.    Rising O₂
  3.    Falling pCO₂
  4.    Falling pO₂
 Discuss Question
Answer: Option A. -> Rising pCO₂
Answer: (a).Rising pCO₂
Question 14. Which of the following is true about hemoglobin?
  1.    Present in dissolved state in blood plasma in scorpion
  2.    Present in dissolved state in blood plasma in earthworm
  3.    It is a dipeptide and present in RBCs in blood worm
  4.    It is a dipeptide in mammals and present in RBCs
 Discuss Question
Answer: Option B. -> Present in dissolved state in blood plasma in earthworm
Answer: (b).Present in dissolved state in blood plasma in earthworm
Question 15. Blood analysis of a patient reveals an unusually high quantity of carboxyhemoglobin content. Which of the following conclusion is most likely to be correct? The patient has inhaled polluted air containing high amount of __________
  1.    Carbon dioxide
  2.    Chloroform
  3.    Carbon monoxide
  4.    Carbon disulphide
 Discuss Question
Answer: Option C. -> Carbon monoxide
Answer: (c).Carbon monoxide
Question 16. The product of glycolysis is ________
  1.    Pyruvate
  2.    Lactic acid
  3.    NADH
  4.    Acetyl coA
 Discuss Question
Answer: Option A. -> Pyruvate
Answer: (a).Pyruvate
Question 17. Where in the cell most of the aerobic respiration takes place?
  1.    Mitochondria
  2.    Nucleus
  3.    Ribosome
  4.    Cytoplasm
 Discuss Question
Answer: Option A. -> Mitochondria
Answer: (a).Mitochondria
Question 18. Which of the following is true for anaerobic respiration?
  1.    Glucose + lactic acid = carbon dioxide + water
  2.    Glucose= Lactic acid + carbon dioxide
  3.    Glucose gives lactic acid
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Glucose gives lactic acid
Answer: (c).Glucose gives lactic acid
Question 19. Catabolic processes ___________
  1.    Make complex molecules
  2.    Break complex molecules
  3.    Occur in autotrophs
  4.    Occur in heterotrophs
 Discuss Question
Answer: Option A. -> Make complex molecules
Answer: (a).Make complex molecules
Question 20. Which of the following occurs both in photosynthesis and respiration?
  1.    Krebs cycle
  2.    Glycolysis
  3.    Calvin cycle
  4.    Chemiosmosis
 Discuss Question
Answer: Option A. -> Krebs cycle
Answer: (a).Krebs cycle

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