MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Statement A: Xylem is multi-directional in nature. Statement B: Phloem is unidirectional in nature. |
| A. | Both the statements are true |
| B. | Both the statements are false |
| C. | Statement A is true but Statement B is false |
| D. | Statement B is true but Statement A is false |
| Answer» C. Statement A is true but Statement B is false | |
| 2. |
Which is the most accepted mechanism for the translocation of sugars from source to sink? |
| A. | Pressure flow hypothesis |
| B. | Cohesion-tension theory |
| C. | Root pressure theory |
| D. | Imbibition |
| Answer» B. Cohesion-tension theory | |
| 3. |
Which condition develops during the process of loading at the phloem tissue? |
| A. | No change |
| B. | Isotonic |
| C. | Hypotonic |
| D. | Hypertonic |
| Answer» E. | |
| 4. |
Sugar solution flows from region of low turgor pressure to region of high turgor pressure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Who gave the mechanism of pressure flow hypothesis? |
| A. | Ernst Munch |
| B. | Henry Dixon |
| C. | Steward |
| D. | Adolph Fick |
| Answer» B. Henry Dixon | |
| 6. |
Statement A: The process of phloem loading is an active process. Statement B: The process of phloem unloading is a passive process. |
| A. | Both the statements are true |
| B. | Both the statements are false |
| C. | Statement A is true but Statement B is false |
| D. | Statement B is true but Statement A is false |
| Answer» D. Statement B is true but Statement A is false | |
| 7. |
Define exudation. |
| A. | Coming out of xylem sap from tips of leaves |
| B. | Loss of water from living aerial tissue in form of vapors |
| C. | Oozing out of liquid from pores and wounds |
| D. | Movement of substances through vascular bundles |
| Answer» D. Movement of substances through vascular bundles | |
| 8. |
The source and sink relationship is variable. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Sucrose is translocated through phloem can be demonstrated by ________ |
| A. | ringing the stem |
| B. | defoliation |
| C. | grafting |
| D. | root pressure |
| Answer» B. defoliation | |
| 10. |
The phloem sap consists of _________ |
| A. | amino acids |
| B. | sucrose |
| C. | hormones |
| D. | stachyose |
| Answer» C. hormones | |