MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Lungs are covered with double layered thin membranous sac called |
| A. | Disphragm |
| B. | Pleura |
| C. | Pericardium |
| D. | Rib cage |
| Answer» C. Pericardium | |
| 2. |
Lungs are spongy due to the presence of million of |
| A. | Air sacs |
| B. | Alveoli |
| C. | Bronchioles |
| D. | Parabronchi |
| Answer» C. Bronchioles | |
| 3. |
_________ respiration is directly involved in the production of energy, necessary for all living activities. |
| A. | Organismic |
| B. | Cellular |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 4. |
In most birds air sacs are _____ in number |
| A. | 10 |
| B. | 3 |
| C. | 4 |
| D. | 9 |
| Answer» E. | |
| 5. |
______ respiration is the process by which cell utilized oxygen and produces CO2 |
| A. | Cellular |
| B. | Organismic |
| C. | Both of these |
| D. | None of these |
| Answer» B. Organismic | |
| 6. |
Vocal cords are stretched across |
| A. | Larynx |
| B. | Pharynx |
| C. | Golttis |
| D. | None of these |
| Answer» D. None of these | |
| 7. |
Of the following, which one is better respiratory medium. |
| A. | Air |
| B. | Water |
| C. | Soil |
| D. | None of these |
| Answer» B. Water | |
| 8. |
Oxygen contents per liter of air is |
| A. | 10 ml |
| B. | 100 ml |
| C. | 200 ml |
| D. | 100ml |
| Answer» D. 100ml | |
| 9. |
Water is _____ times viscous than air |
| A. | 50 |
| B. | 1000 |
| C. | 5000 |
| D. | 8000 |
| Answer» B. 1000 | |
| 10. |
Functional units of lungs are called |
| A. | Alveoli |
| B. | Air sacs |
| C. | Parabronchi |
| D. | None of these |
| Answer» C. Parabronchi | |
| 11. |
There are ______ stomata per square cm of leaf surface in Tobacco plants. |
| A. | 1200 |
| B. | 12000 |
| C. | 100,000 |
| D. | 1000 |
| Answer» C. 100,000 | |
| 12. |
The air spaces may comprise upto ______ of total volume of leaf surface. |
| A. | 30% |
| B. | 20% |
| C. | 40% |
| D. | 50% |
| Answer» D. 50% | |
| 13. |
The glycolate produced diffuses into the membrane bounded organelles called |
| A. | Glyoxisomes |
| B. | Peroxisomes |
| C. | Lysosomes |
| D. | Mitochondria |
| Answer» C. Lysosomes | |
| 14. |
Active site of Rubisco is evolved to bind |
| A. | CO2 |
| B. | O2 |
| C. | Both of these |
| D. | H2O |
| Answer» D. H2O | |
| 15. |
Number of spiracles present in cockroach is |
| A. | 15 |
| B. | 10 |
| C. | 20 |
| D. | 30 |
| Answer» D. 30 | |
| 16. |
Number of spiracles present in the thorax of cockroach is |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 4 |
| Answer» E. | |
| 17. |
The blood enters the _____ side of heart |
| A. | Posterior |
| B. | Anterior |
| C. | Lateral |
| D. | All possible |
| Answer» B. Anterior | |
| 18. |
When abdomen expands, the number of spiracles open is |
| A. | 2 |
| B. | 3 |
| C. | 6 |
| D. | 8 |
| Answer» E. | |
| 19. |
Gaseous exchange through the skin is known as ______ respiration. |
| A. | Cuticular |
| B. | Cutaneous |
| C. | Skin |
| D. | Pulmonary |
| Answer» C. Skin | |
| 20. |
Parabronchi are open at ______ end/s |
| A. | Single |
| B. | Both |
| C. | Do not have opening |
| D. | None of these |
| Answer» C. Do not have opening | |