Plant Physiology
Water relations
Questions and Answers
- 1.
Special type of diffusion where semi-permeable membrane is required is called..............?
- A.
Special diffusion
- B.
Osmosis
- C.
Imbibition
- D.
None of the above
Correct Answer
B. OsmosisExplanation
Osmosis is a special type of diffusion that occurs when a semi-permeable membrane is required. In osmosis, solvent molecules move from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. This process is important for maintaining the balance of water and solutes in cells and is commonly observed in biological systems.Rate this question:
-
- 2.
The pressure which develops in a cell from time to time due to osmotic diffusion of water is known as?
- A.
Turgor pressure
- B.
Osmotic pressure
- C.
Diffusion pressure deficit
- D.
Suction pressure
Correct Answer
A. Turgor pressureExplanation
Turgor pressure is the correct answer because it refers to the pressure that develops in a cell as a result of osmotic diffusion of water. This pressure is responsible for maintaining the shape and rigidity of plant cells, and it plays a crucial role in various cellular processes such as cell growth and movement. Osmotic pressure, diffusion pressure deficit, and suction pressure are not specific terms used to describe the pressure developed in a cell due to osmotic diffusion of water.Rate this question:
-
- 3.
Water potential of protoplasm is equal but opposite to Diffusion Pressure Deficit
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because water potential is a measure of the tendency of water to move from one place to another. Protoplasm, which is the living substance within a cell, has a water potential that is equal but opposite to the diffusion pressure deficit. This means that if the diffusion pressure deficit is high, indicating a low concentration of water molecules, the water potential of the protoplasm will be low, causing water to move into the cell. Conversely, if the diffusion pressure deficit is low, indicating a high concentration of water molecules, the water potential of the protoplasm will be high, causing water to move out of the cell.Rate this question:
-
- 4.
The adsorption of watre by hydrophilic colloids is known as
- A.
Diffusion pressure deficit
- B.
Imbibition
- C.
Osmosis
- D.
None of the above
Correct Answer
B. ImbibitionExplanation
Imbibition refers to the process of adsorption of water by hydrophilic colloids. This process occurs when the hydrophilic colloids attract and hold water molecules, causing them to be absorbed and retained. Diffusion pressure deficit and osmosis are not applicable in this context as they involve different mechanisms of water movement. Therefore, the correct answer is imbibition.Rate this question:
-
- 5.
For a plant cell to undergo plasmolysis, it should be place in
- A.
Hypotonic solution
- B.
Hypertonic solution
- C.
Neutral solution
- D.
Isotonic solution
Correct Answer
B. Hypertonic solutionExplanation
Plasmolysis is the process in which a plant cell loses water and shrinks due to being placed in a solution with a higher solute concentration than the cell's cytoplasm. In a hypertonic solution, the solute concentration outside the cell is higher than inside the cell, causing water to move out of the cell through osmosis. This loss of water leads to the cell membrane detaching from the cell wall and the cell undergoing plasmolysis. Therefore, a plant cell needs to be placed in a hypertonic solution for plasmolysis to occur.Rate this question:
-
- 6.
Turgor pressure is at the lowest in case of a flaccid cell
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Turgor pressure refers to the pressure exerted by the cell contents against the cell wall. In a flaccid cell, the cell is limp and lacks water, resulting in low turgor pressure. When a cell is flaccid, it is not fully hydrated and is in a state of reduced pressure. Therefore, the statement that turgor pressure is at the lowest in a flaccid cell is true.Rate this question:
-
- 7.
Water potential is denoted by the symbol
- A.
Rho
- B.
Epsilon
- C.
Psi
- D.
Zeta
Correct Answer
C. PsiExplanation
Water potential is denoted by the symbol "Psi". Water potential is a measure of the potential energy of water in a system, and it determines the direction and rate of water movement. It is influenced by factors such as solute concentration, pressure, and gravity. The symbol "Psi" is commonly used to represent water potential in scientific literature and equations.Rate this question:
-
- 8.
When a solvent is separated from a solution, the solvent molecules being higher in concentration will diffuse towards the solution under a pressure. This pressure is is known as
- A.
Wall pressure
- B.
Turgor pressure
- C.
Diffusion pressure deficit
- D.
Matric potential
Correct Answer
C. Diffusion pressure deficitExplanation
When a solvent is separated from a solution, the solvent molecules will naturally move from an area of higher concentration (in the solution) to an area of lower concentration (outside the solution). This movement creates a pressure, known as diffusion pressure deficit, which drives the solvent molecules to diffuse towards the solution. Therefore, the correct answer is diffusion pressure deficit.Rate this question:
-
- 9.
The point at which plasmolysis just begins is known as
- A.
Initial plasmolysis
- B.
Incipient plasmolysis
- C.
Pre plasmolysis
- D.
None of the above
Correct Answer
B. Incipient plasmolysisExplanation
Incipient plasmolysis refers to the point at which plasmolysis just begins. Plasmolysis is the process in which plant cells lose water and shrink due to the movement of water out of the cell. At the stage of incipient plasmolysis, the cell membrane starts to pull away from the cell wall, indicating the beginning of water loss. This term is commonly used in biology to describe the initial stage of plasmolysis in plant cells.Rate this question:
-
- 10.
The strip of young endodermal cells of the root possess suberised thickening on lateral and radial walls. This strip is known as
- A.
Endodermal strip
- B.
Suberised strip
- C.
Casparian strip
- D.
Pericycle
Correct Answer
C. Casparian stripExplanation
The strip of young endodermal cells in the root that have suberised thickening on their lateral and radial walls is known as the Casparian strip. This strip acts as a barrier and prevents the passive flow of water and solutes between cells, forcing them to pass through the selective plasma membrane of the endodermal cells. This helps in regulating the movement of water and nutrients into the vascular tissue of the root.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Feb 11, 2012Quiz Created by
Saif_immortal
- Bacteria Quizzes
- Bio Quizzes
- Biological Evolution Quizzes
- Biology Exam Quizzes
- Biology Test Quizzes
- Cell Quizzes
- Cell Biology Quizzes
- Chapters Of Biology Quizzes
- Classical Conditioning Quizzes
- Conservation Biology Quizzes
- Enzyme Quizzes
- Fungi Quizzes
- General Biology Quizzes
- Genetics Quizzes
- Immunology Quizzes
- Macromolecule Quizzes
- Marine Biology Quizzes
- Microbiology Quizzes
- Mitosis And Meiosis Quizzes
- Molecular Biology Quizzes
- Parasitology Quizzes
- Prokaryote Quizzes
- Protist And Fungi Quizzes
- Protozoa Quizzes
- Respiratory Quizzes
- Spine Quizzes
- Stem Cell Quizzes
- Taxonomy Quizzes
- Traits Quizzes
- Ultimate Biology Quizzes
- Virus Quizzes
- Zoology Quizzes
Back to top