Breathing and Exchange of Gases MCQs | Breathing and Exchange of Gases Multiple Choice Questions (MCQs) with Answers

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Questions
1 In mature mammalian erythrocytes the respiration is
A aerobic
B anaerobic
C sometimes aerobic and sometimes anaerobic
D absent

Answer:anaerobic
2 Skin of man cannot act as respiratory organ because
A it is dry
B it is not thin
C it is not permeable to O2 and CO2
D all of these

Answer: all of these
3 Which of the following is not a character of respiratory surface?
A thin,permeable to gases
B extensive
C least vascular
D moist

Answer: least vascular
4 Ring like cartilage of larynx is known as
A thyroid cartilage
B arytenoid cartilage
C cricoid cartilage
D cartilage of santonni

Answer: cricoid cartilage
5 Lungs are enclosed in
A peritoneum
B perichondrium
C pericardium
D pleural membranes

Answer: pleural membranes
6 Which of the following reflex is involved to prevent excessive inflation of lungs?
A stretch reflex
B hering-breuer’s reflex
C withdrawal reflex
D conditioned reflex

Answer: hering-breuer’s reflex
7 The ventilation movements of lungs in mammals are governed by
A muscular walls of lung
B diaphragm
C costal muscles
D both B and C

Answer: both B and C
8 Which of the following is true for aerobic respiration in humans?
A Glucose + water = carbon dioxide + water
B Glucose + oxygen = Carbon dioxide + water
C Glucose = Carbon dioxide + water
D None of the mentioned

Answer:Glucose + oxygen = Carbon dioxide + water
9 Respiration results in ___________
A Release of oxygen
B Anabolism
C Release of carbon dioxide
D Transfer of carbon dioxide

Answer:Release of carbon dioxide
10 During hibernation frogs respire through ________
A Gills
B Lungs
C Tympanum
D Integument

Answer: Integument
11 In which of the following animal respiration occur without any respiration organs?
A Frog
B Fish
C Cockroach
D Earthworm

Answer: Earthworm
12 Fishes respire through skin.
A True
B False

Answer:False
13 The product of glycolysis is ________
A Pyruvate
B Lactic acid
C NADH
D Acetyl coA

Answer: Pyruvate
14 Where in the cell most of the aerobic respiration takes place?
A Mitochondria
B Nucleus
C Ribosome
D Cytoplasm

Answer: Mitochondria
15 Which of the following occurs both in photosynthesis and respiration?
A Krebs cycle
B Glycolysis
C Calvin cycle
D Chemiosmosis

Answer: Krebs cycle
16 Which of the following is true for anaerobic respiration?
A Glucose + lactic acid = carbon dioxide + water
B Glucose= Lactic acid + carbon dioxide
C Glucose gives lactic acid
D None of the mentioned

Answer:Glucose gives lactic acid
17 Catabolic processes ___________
A Make complex molecules
B Break complex molecules
C Occur in autotrophs
D Occur in heterotrophs

Answer: Make complex molecules
18 Respiration is controlled by _________
A Cerebrum
B Cerebellum
C Medulla oblongata
D Hypothalamus

Answer: Medulla oblongata
19 The majority of carbon dioxide produced by the body is transported to lungs _______
A Dissolved in blood
B As carbonates
C As bicarbonates
D Attached to hemoglobin

Answer: As carbonates
20 Which one of the following mammalian cells are not capable of metabolizing glucose to carbon dioxide aerobically?
A RBC
B WBC
C Liver cells
D Unstraited muscle cells

Answer: RBC

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