MCQOPTIONS
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MCQOPTIONS
This section includes 39 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. |
There are _______ types of nutrients needed by plants besides light to carry out photosynthesis |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 2. |
The site/s where most of the uptake of water and minerals take place is/are |
| A. | Root hairs |
| B. | Root cells |
| C. | Underground stem |
| D. | All of these |
| Answer» B. Root cells | |
| 3. |
The uptake of water in plants involves |
| A. | Active transport |
| B. | Passive transport |
| C. | Both of these |
| D. | None of these |
| Answer» C. Both of these | |
| 4. |
The membrane of vacuoles is known as |
| A. | Vacuoloplast |
| B. | Tonoplast |
| C. | Tanoplast |
| D. | All of these |
| Answer» C. Tanoplast | |
| 5. |
The diffusion of ions along with water also takes place by mass flow system along the ______ path |
| A. | Tonoplast |
| B. | Apoplast |
| C. | Symplast |
| D. | Vacuolar |
| Answer» C. Symplast | |
| 6. |
Active transport is dependent on |
| A. | Photosynthesis |
| B. | Respiration |
| C. | Photophosporylation |
| D. | None of these |
| Answer» C. Photophosporylation | |
| 7. |
The flow of lymph is maintained by |
| A. | Movement of viscera |
| B. | Breathing movements |
| C. | Valves |
| D. | All of these |
| Answer» E. | |
| 8. |
Introduction of vaccine within the body to produce immunity is an example of |
| A. | Artificially induced active immunity |
| B. | Naturally induced active immunity |
| C. | Artificially induced passive immunity |
| D. | Naturally induced passive immunity |
| Answer» B. Naturally induced active immunity | |
| 9. |
Exceptionally the positive hydrostatic pressure generated by root pressure is about |
| A. | 600 Kpa |
| B. | 800 Kpa |
| C. | 1000 Kpa |
| D. | 900 Kpa |
| Answer» C. 1000 Kpa | |
| 10. |
Cuticular transpiration is ______ of total transpiration |
| A. | 6-8% |
| B. | 5-7% |
| C. | 7-9% |
| D. | 4-6% |
| Answer» C. 7-9% | |
| 11. |
All plants do not possess |
| A. | Lenticels |
| B. | Cuticle |
| C. | Stomata |
| D. | All of these |
| Answer» B. Cuticle | |
| 12. |
Lenticular transpiration is _________ of total transpiration |
| A. | 2-3% |
| B. | 1-3% |
| C. | 1-4% |
| D. | 1-2% |
| Answer» E. | |
| 13. |
Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are |
| A. | Hydathods |
| B. | Stomata |
| C. | Lenticels |
| D. | None of these |
| Answer» D. None of these | |
| 14. |
Lenticels look like |
| A. | A big pore |
| B. | Stoma |
| C. | Sponge |
| D. | Cars or small protusions |
| Answer» E. | |
| 15. |
Stomatal transpiration is _____ of total transpiration |
| A. | 90% |
| B. | 91% |
| C. | 93% |
| D. | 95% |
| Answer» B. 91% | |
| 16. |
Pressure flow theory was proposed by |
| A. | H-Van Mohl |
| B. | Dixon |
| C. | Vander wall. |
| D. | Earnst Munch |
| Answer» E. | |
| 17. |
They function as multisensory hydraulic valve |
| A. | Lenticels |
| B. | Guard cells |
| C. | Hydathods |
| D. | All of these |
| Answer» C. Hydathods | |
| 18. |
There are _______ hypothesis which may explain opening and closing of stomata |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 19. |
Low level of CO2 favours _____ of the stomata |
| A. | Opening |
| B. | Closure |
| C. | Both of these |
| D. | None of these |
| Answer» B. Closure | |
| 20. |
Stomata open due to _____ of K+ into the guard cells from the surrounding epidermis |
| A. | Diffusion |
| B. | Active transport |
| C. | Osmosis |
| D. | All of these |
| Answer» C. Osmosis | |
| 21. |
The opening and closing of stomata is directly controlled by the |
| A. | Temperature |
| B. | PH |
| C. | Light |
| D. | None of these |
| Answer» D. None of these | |
| 22. |
Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called: |
| A. | Diffusion. |
| B. | Facilitated diffusion. |
| C. | Passive transport. |
| D. | Active transport. |
| Answer» C. Passive transport. | |
| 23. |
Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called |
| A. | Transpiration pull |
| B. | Root pressure |
| C. | Ascent of sap. |
| D. | All of these |
| Answer» B. Root pressure | |
| 24. |
A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called |
| A. | Transpiration pull |
| B. | Root pressure |
| C. | Osmotic pressure. |
| D. | None of these |
| Answer» C. Osmotic pressure. | |
| 25. |
Open circulatory system can contain |
| A. | Red Blood Cells |
| B. | White Blood Cells |
| C. | Haemoglobin |
| D. | All of these |
| Answer» C. Haemoglobin | |
| 26. |
Single circuit heart is found in |
| A. | Fishes |
| B. | Amphibians |
| C. | Reptiles |
| D. | Mammals |
| Answer» B. Amphibians | |
| 27. |
It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood. |
| A. | 35% |
| B. | 45% |
| C. | 55% |
| D. | 75% |
| Answer» D. 75% | |
| 28. |
_______ give rise to macrophages, which destroy larger particles by phagocytosis. |
| A. | Nautrophils |
| B. | Basophila |
| C. | Monocyte |
| D. | Lymphocyte |
| Answer» D. Lymphocyte | |
| 29. |
Tricuspid valve is present |
| A. | Between right atrium and right ventricle |
| B. | Between left atrium and left ventricle |
| C. | At base of pulmonary artery |
| D. | At base of aorta |
| Answer» B. Between left atrium and left ventricle | |
| 30. |
QRS complex represents |
| A. | Atrial systole |
| B. | Ventricular systole |
| C. | Atrial diastole |
| D. | Ventricular diastole |
| Answer» C. Atrial diastole | |
| 31. |
All of the follwing are blood clots except |
| A. | Thrombus |
| B. | Embolus |
| C. | Atheroma |
| D. | Hematoma |
| Answer» D. Hematoma | |
| 32. |
It is the discharge of blood from blood vessels. |
| A. | Myocardial infarction |
| B. | Cerebral infarction |
| C. | Cerebral Hemorrhage |
| D. | Thromboembolism |
| Answer» D. Thromboembolism | |
| 33. |
Cytoplasmic strands that extend through pores in adjacent cell walls are known as |
| A. | Pseudopods |
| B. | Symplasts |
| C. | Plasmodesmata |
| D. | Pili |
| Answer» D. Pili | |
| 34. |
In plants, water potential is determined by major factors. |
| A. | Three |
| B. | Four |
| C. | Two |
| D. | Five |
| Answer» D. Five | |
| 35. |
The pressure generated when water enters & inflates plant cells is called ______ potential |
| A. | Water |
| B. | Osmotic |
| C. | Pressure |
| D. | Solute |
| Answer» D. Solute | |
| 36. |
_______ potential is the measure of the change in water potential of a system due to the presence of solute molecules. |
| A. | Osmotic |
| B. | Pressure |
| C. | Both of these |
| D. | None of these |
| Answer» B. Pressure | |
| 37. |
Solute potential is always |
| A. | Plus ve |
| B. | ? ve |
| C. | Plus ve or ? ve |
| D. | Zero |
| Answer» C. Plus ve or ? ve | |
| 38. |
_______ component of cell wall has grreat affinity with water. |
| A. | Lignin |
| B. | Cellulose |
| C. | Pectin |
| D. | All of these |
| Answer» E. | |
| 39. |
Commonly in other plants than tall ones the speed of upward movement of water is |
| A. | 8mh-1 |
| B. | 1 mh-1 |
| C. | 7 mh-1 |
| D. | 4 mh-1 |
| Answer» C. 7 mh-1 | |