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STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 8. Cell the unit of life1 Mark
MCQ
Vacuole in a plant cell
  • A
    lacks membrane and contains air
  • B
    lacks membrane and contains water and excretory substances
  • C
    is membrane­bound and contains storage proteins and lipids
  • ✓
    is membrane­bound and contains water and excretory substances.
✓

Answer

Correct option: D.
is membrane­bound and contains water and excretory substances.
d
(d) : In a plant cell, vacuole may be defined as a non­living reservoir, bounded by a differentially or selectively permeable membrane, the tonoplast. It is filled with a highly concentrated solution called vascular sap or cell sap which contains many dissolved solutes such as organic acids, soluble carbohydrates, soluble nitrogenous compounds as nitrates, enzyme, tannins, chlorides, phosphates, amino acids, alkaloids and anthocyanin pigments.

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