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Biology MCQ Question - Transport

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1. Cellular respiration is essentially a/an _________ process.




2. Breaking of terminal phosphate of ATP releases about _____ Kcal of energy.




3. Final acceptor of electrons in respiratory chain is




4. There are _______ types of nutrients needed by plants besides light to carry out photosynthesis




5. The site/s where most of the uptake of water and minerals take place is/are




6. The uptake of water in plants involves




7. The membrane of vacuoles is known as




8. The diffusion of ions along with water also takes place by mass flow system along the ______ path




9. Active transport is dependent on




10. In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.




11. Cytoplasmic strands that extend through pores in adjacent cell walls are known as




12. In plants, water potential is determined by major factors.




13. The pressure generated when water enters & inflates plant cells is called ______ potential




14. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)




15. _______ potential is the measure of the change in water potential of a system due to the presence of solute molecules.




16. Solute potential is always




17. _______ component of cell wall has grreat affinity with water.




18. Commonly in other plants than tall ones the speed of upward movement of water is




19. Exceptionally the positive hydrostatic pressure generated by root pressure is about




20. Cuticular transpiration is ______ of total transpiration




21. All plants do not possess




22. Lenticular transpiration is _________ of total transpiration




23. Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are




24. Lenticels look like




25. Stomatal transpiration is _____ of total transpiration




26. They function as multisensory hydraulic valve




27. There are _______ hypothesis which may explain opening and closing of stomata




28. Stomata open due to _____ of K+ into the guard cells from the surrounding epidermis




29. Low level of CO2 favours _____ of the stomata




30. The opening and closing of stomata is directly controlled by the




31. Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.




32. Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called:




33. Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called




34. Pressure flow theory was proposed by




35. A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called




36. Open circulatory system can contain




37. Which of the following is true about hearts of earthworm?




38. Single circuit heart is found in




39. It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood.




40. 95% of the cytoplasm ofred blood cells is the




41. _______ give rise to macrophages, which destroy larger particles by phagocytosis.




42. Which of the following are proteins in nature?




43. Tricuspid valve is present




44. QRS complex represents




45. Which of the following have thickest walls?