Question : Stomatal opening is based on which of the following?
Option 1: Exosmosis
Option 2: Endosmosis
Option 3: Plasmolysis in guard cells
Option 4: Decrease in concentration of cell sap
Correct Answer: Endosmosis
Solution : The correct option is Endosmosis.
Endosmosis is the mechanism by which plant guard cells open their stomata. The passage of water over a semi-permeable membrane from a low solute concentration area to a high solute concentration area is osmosis. Water travels into guard cells as a result of the concentration of potassium ions (K+) within the guard cells. Water absorption by guard cells via osmosis turgor pressure helps in stomatal opening.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : A cell becomes turgid because of
Option 1: Plasmolysis
Option 2: Exosmosis
Option 3: Endosmosis
Option 4: Diffusion
Question : Which of the following cell structures is present only in plant cells?
Option 1: Mitochondria
Option 2: Cell wall
Option 3: Cell membrane
Option 4: Vacuole
Question : The kidney-shaped guard cells are present in which of the following?
Option 1: Dicot plants
Option 2: Monocot plants
Option 3: Both of the above
Option 4: Algae
Question : The main function of centriole is:
Option 1: to help plant cells with multiplication
Option 2: to help cell division in animal cells
Option 3: to maintain rigidity in plant cell
Option 4: to maintain mineral composition in bacterial cell
Question : Dumb-bell shaped guard cells are present in
Option 1: Groundnut
Option 2: Gram
Option 3: Wheat
Option 4: Mango
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile