Question

The outermost rigid and non-living covering of a plant cell is known as _______ .

• A. tonoplast
• B. cell wall
• C. chloroplast
• D. plasma membrane

Answer 1

The correct option is B cell wall

In addition to the plasma membrane (cell membrane), plants have an additional protective layer called the cell wall. Animal cells do not have a cell wall. Animal cells are covered only by a cell membrane. The cell wall is a non-living, rigid membrane that is made up of cellulose. It provides mechanical strength and support to the cell. Tonoplast is the membrane surrounding the vacuole. Chloroplast is a plastid present in plant cells that help in photosynthesis.