Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
The following substances are commonly stored in the central vacuole of mature plant cells, EXCEPT:
Water
Cell sap
Sugars
DNA
DNA
The central vacuole is a membrane-bound organelle (the tonoplast) that stores water, ions, nutrients, and waste products to maintain turgor pressure. DNA is strictly localized within the nucleus (and semi-autonomously in mitochondria and chloroplasts) and is never stored within the central vacuole.
The central vacuole is a membrane-bound organelle (the tonoplast) that stores water, ions, nutrients, and waste products to maintain turgor pressure. DNA is strictly localized within the nucleus (and semi-autonomously in mitochondria and chloroplasts) and is never stored within the central vacuole.
The central vacuole is like a home's storage pantry (holding water and supplies), whereas the nucleus is the home office where the blueprints (DNA) are safely locked away.
VACU: V-olume, A-queous sap, C-arbohydrates, U-tility (but NOTDNA!).
╬иwтАЛ=╬иsтАЛ+╬иpтАЛ тАФ where ╬иwтАЛ is water potential, ╬иsтАЛ is solute potential, and ╬иpтАЛ is pressure potential.
The tonoplast contains active transport proteins that pump solutes into the vacuole. This creates a hypertonic environment inside, leading to water influx via osmosis, which generates turgor┬аpressure=╬иpтАЛ. The vacuole acts as a storage reservoir and a waste disposal site, but genetic information remains sequestered in the chromatin.
The central vacuole is surrounded by a single membrane called the tonoplast.
Turgor pressure provided by the vacuole maintains the structural integrity of herbaceous plants.
DNA is restricted to the nucleus, chloroplasts, and mitochondria.
Cell sap is the concentrated solution of salts, sugars, and organic acids stored in the vacuole.
Provides mechanical support through turgidity.
Allows for rapid cell expansion without synthesizing large amounts of cytoplasm.
Maintenance of plant cell shape.
Storage of pigments like anthocyanins for flower coloration.
The tonoplast is a semi-permeable membrane that regulates the flow of ions.
Option A (Water) is the main component of cell sap (usually >90%).
Option B (Cell sap) refers to the fluid contained within the vacuole.
Option C (Sugars) are stored in the vacuole for metabolic use during energy deficits.
D is correct тАФ DNA is genetic material stored in the nucleus and organelles with its own genome, not in the central vacuole.
In exams, remember that the vacuole handles storage and pressure, while the nucleus handles information, and the mitochondria/chloroplasts handle energy; this functional segregation is key to identifying cell part functions.