Question

In plant cell, the vacuole __________.

• A. Contains air and lacks membrane
• B. Contains water and excretory substances but lacks membrane
• C. Contains storage protein and lipids and is membrane bound
• D. Is membrane bound, contains water and excretory substances

Answer 1

Answer: (D)

Is membrane bound, contains water and excretory substances

Vacuoles are membrane bound organelles present in cells. The membrane of the vacuoles is composed of phospholipid molecules and transmembrane proteins. The proteins function to transport molecules of certain shape and size to pass through it. Vacuoles in plant cells are well-developed structures and take part in storage, while vacuoles of animals do not play any major role in the functioning of the cells. Plant cell vacuoles are large structures and occupy most of the cell. The membrane surrounding the vacuoles is known as the tonoplast and is filled with cell sap. The vacuoles contain water, minerals, enzymes and excretory wastes. The vacuoles are not composed of air or proteins.

So, the correct option is 'D'.