NTSE Biology Respiration MCQs

Question: If the thoracic wall but not the lungs is punctured

• a) The lungs get inflated
• b) The man dies as the lungs get collapsed
• c) The breathing rate decreases
• d) The breathing rate increases

Answer: The man dies as the lungs get collapsed

Question: In mammals the body cavity is partitioned into thoracic and abdominal parts by

• a) Liver
• b) Lungs
• c) Ribs
• d) Diaphragm

Answer: Diaphragm

Question: During inspiration, air passes into lungs due to

• a) Increase in volume of thoracic cavity and fall in lung pressure
• b) Fall in pressure inside the lungs
• c) Increased volume of thoracic cavity
• d) Muscular expansion of lungs

Answer: Increase in volume of thoracic cavity and fall in lung pressure

Question: Net gain of ATP molecules formed in glycolysis is

• a) 2
• b) 4
• c) 36
• d) 38

Answer: 2

Question: Skin is an ideal respiratory organ in frog because it is

• a) Highly vascular
• b) Kept moist
• c) Devoid of hair and scales
• d) All the above

Answer: All the above

Question: Each molecule of NADPH releases how many number of ATP molecules

• a) 5
• b) 2
• c) 3
• d) 4

Answer: 3

Question: Which one of the following equation represents the aerobic respiration ? 

• a) 6CO2 + 6H2O → C6H₁₂O6 + 6O2
• b) C6H₁₀O2 + 6O2 →6CO2 + 5H2O + 674 Kcal
• c) C6H₁₂O6 + 6O2  → 6CO2 + 6H2O + 686 Kcal
• d) C6H₁₂O6 + 6O2  →6H2CO3

Answer: C6H₁₂O6 + 6O2  →6CO2 + 6H2O + 686 Kcal

Question: Respiration is

• a) Anabolic and exergonic
• b) Anabolic and enedergonic
• c) Catabolic and exergonic
• d) Catabolic and entergonic

Answer: Catabolic and exergonic

Question: Usable energy of respiration is

• a) Immediately consumed in cellular activities
• b) Trapped in ATP molecules
• c) Stores as heat
• d) Used in charging biomolecules into activity

Answer: Trapped in ATP molecules

Question: Caloric value of 9.5 K cal/ gm is found case of

• a) Carbohydrates
• b) Fats
• c) Proteins
• d) Vitamins

Answer: Fats

Question: Glycolysis occurs in

• a) Anaerobic organisms
• b) Muscle cells
• c) Prokaryotic cells
• d) Almost all the cells

Answer: Almost all the cells

Question: Each molecule of NADPH releases how many number of ATP molecules

• a) 5
• b) 2
• c) 3
• d) 4

Answer: 3