Assertion (A): Plant cells have very large vacuoles.Reason (R): In pla...
Plant cells possess large vacuoles to perform functions like:
i. Storage of water, mineral etc.
ii. Provide turgidity and rigidity to the cell, as it is filled with cell sap.
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Assertion (A): Plant cells have very large vacuoles.Reason (R): In pla...
Assertion (A): Plant cells have very large vacuoles.
Reason (R): In plant cells, vacuoles are full of cell sap.
Explanation:
Plant cells are unique in many ways compared to animal cells. One of the key differences is the presence of a large central vacuole in plant cells. Let's analyze the given assertion and reason to understand why option 'A' is the correct answer.
Plant cells have very large vacuoles:
- A vacuole is a fluid-filled organelle found in the cytoplasm of plant cells.
- Plant cells generally contain a single, large central vacuole that occupies a significant portion of the cell's volume.
- The central vacuole in plant cells is responsible for various functions such as storage, maintenance of turgidity, and waste disposal.
- The size of the vacuole can vary depending on the plant species and the stage of development.
In plant cells, vacuoles are full of cell sap:
- The central vacuole in plant cells is filled with a solution called cell sap.
- Cell sap is a mixture of water, nutrients, ions, pigments, and other substances that help maintain the cell's internal environment.
- The cell sap provides support to the plant cell by exerting pressure against the cell wall, maintaining turgor pressure.
- It also acts as a storage site for various molecules, including sugars, amino acids, and pigments.
- The cell sap can be involved in various physiological processes such as maintaining pH balance and detoxification.
Conclusion:
Both the assertion and the reason are true, and the reason correctly explains why plant cells have very large vacuoles. The central vacuole in plant cells is indeed full of cell sap, which serves multiple functions like storage and maintenance of turgidity. Therefore, option 'A' is the correct answer.
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