Biology Transportation, Biology Transportation in Plants Online MCQs with Answers
Biology gaseous transportation exchange serves as the life-sustaining force that maintains effective gas, water, and nutrient distribution in living organisms. The direction of molecules through plant tissues follows a distinct path where the xylem bonds water and minerals from roots while the phloem transfers photosynthesis sugars across the plant structures. Living animals use their respiratory systems with their circulatory systems to bring oxygen to cells while pulling carbon dioxide out.
To aid ECAT and MDCAT aspirants, we provide Biology Gaseous Transportation Exchange MCQs, covering fundamental concepts like diffusion, transpiration, root pressure, and mass flow.
Biology Gaseous Transportation Exchange in Animals
The circulatory system acts as a pathway to carry oxygen from animal lungs to each body cell. Hemoglobin loaded within red blood cells functions to capture and transport oxygen toward body cells efficiently. Body cells transfer carbon dioxide waste products to the lungs for exhalation. Gaseous transportation requires all three elements of diffusion gradients, pressure differences and transport proteins to operate effectively.
Key Concepts:
- Oxygen transport relies on hemoglobin for efficient delivery.
- Carbon dioxide is expelled primarily through the lungs.
- Diffusion is the main mechanism driving gas exchange in cells.
Biology Gaseous Transportation Exchange in Plants
Plants rely on the xylem and phloem for internal transportation. The xylem carries water and minerals upward from the roots, driven by root pressure, cohesion-tension, and transpiration pull. The phloem transports sugars and nutrients from leaves to other parts of the plant through mass flow.
Important Points:
- Stomata regulate gas exchange in plants.
- The xylem moves water from roots to leaves using capillary action.
- The phloem distributes organic nutrients throughout the plant.
MCQs for ECAT and MDCAT Preparation
1. At incipient plasmolysis the protoplast has just ceased to exert any pressure against the cell wall so the cell is ?
- Burst
- Collapsed
- Flaccidcorrect
- Turgid
2. Ascent of sap involves ?
- Cohesion tension theory
- Root pressure
- All of abovecorrect
- Imbibition
3. Most of ions taken up by the roots by the process of ?
- diffusion
- facilitated diffusion
- Active transportcorrect
- Passive transport
4. Symbiotic relationships help plants acquire ?
- Nutrientscorrect
- Light
- Phosphorus
- Nitrogen
5. The casparian strips are present in ?
- Endodermal cells of rootscorrect
- cells of phloem
- Cortex cells of roots
- Cells of pericycle
6. Mycorrhizae are present in 90% families of ?
- Pteridophytes
- Flowering plantscorrect
- Seed plants
- Amphibious plants
7. Xylem water tension is strong enough to pull water up to ?
- 200 meterscorrect
- 300 meters
- 600 meters
- 100 meters
8. It has been estimated that a positive hydrostatic pressure generated by root pressure is around ?
- 350 to 450 Kpa
- 300 to 400 Kpa
- 200 to 300 Kpa
- 100 to 200 Kpacorrect
9. Uptake of minerals by root cells is ?
- Active
- Passive
- Invasive
- Both a and bcorrect
10. Distilled water has ?
- Negative water potential
- Highest water potentialcorrect
- Lowest water potential
- Moderate water potential
11. Plants are able to synthesize all their required compounds with the help of ?
- Light energy
- All of thesecorrect
- Carbon
- Minerals and Hydrogen
12. The combined length of branch roots of aa rye plant is ?
- 50 kilometers
- 400 kilometers
- 600 kilometerscorrect
- 550 kilometers
13. The other name of solute potential is ?
- Osmotic potentialcorrect
- Solvent potential
- Wall potential
- Water potential
14. The pressure exerted by a vertical force of one Newton on an area of 1 meter square is called ?
- 1000 Pascals
- Both a and bcorrect
- Kpa
- 100 pascals
15. Some of the minerals enter the root hairs or epidermal cells of roots by ?
- Diffusion
- Facilitated diffusion
- All of thesecorrect
- Active transport
16. Root pressure is leaf effective during ?
- Evening
- Morning
- Night
- Daycorrect
17. There is no mass flow system in ?
- Unicellular organisms
- Lower multicellular organisms
- Complex multicellular organisms
- Both a % bcorrect
18. Active transport is selective and depend upon ?
- Transpirationcorrect
- Photosynthesis
- Respiration
- Guttation
19. As a leaf transpires the water potential of its mesophyll cell is ?
- Stopped
- Fairly maintained
- Droppedcorrect
- Increased
20. Water molecules move along cell walls of xylem vessels due to imbibition was proposed by ?
- Stocking
- Dixon
- Sackscorrect
- Jolly
21. The dew drops seen on the tips of leaves are actually guttation droplets exuded from ?
- All of these
- Cuticle
- Hydathodescorrect
- Lenticels
22. Guttation is more notable when transpiration is ?
- Increased
- Suppressedcorrect
- None of above
- Stopped
23. Closely associated with root pressure is a phenomenon called guttation or ?
- Exudationcorrect
- Transpiration
- Imbibition
- Bleeding
24. The membranes of vacuoles are also ?
- Sympast
- Apoplast
- Tonoplastcorrect
- All of these
25. Root pressure is created by the active secretion of salts and other solutes from other cells into the ?
- Cell sap
- Xylem and phloem sap
- Phloem sap
- Xylem sapcorrect
Conclusion
The biology gaseous transportation exchange process is critical for both plants and animals, ensuring oxygen, water, and nutrients reach the necessary cells for survival. In plants, the xylem and phloem facilitate movement, while in animals, respiratory and circulatory systems transport essential gases. Understanding these concepts through Biology Gaseous Transportation Exchange MCQs will enhance ECAT and MDCAT preparation.
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