In plant cells, which structure forms the rigid outer boundary?

In plant cells, which structure forms the rigid outer boundary?

• A. Cell Wall
• B. Cell Membrane
• C. Nucleus
• D. Chloroplast

Answer: (A)

The rigid outer boundary is formed by the cell wall. This tough layer sits outside the plasma membrane and is made mainly of cellulose, giving plant cells their shape and structural support. It helps resist internal water pressure from the vacuole, keeping the cell from bursting and helping the plant stand upright. The membrane inside the wall controls what enters and exits the cell, while the nucleus and chloroplasts have other roles related to genetics and photosynthesis, not boundary formation.

The rigid outer boundary is formed by the cell wall. This tough layer sits outside the plasma membrane and is made mainly of cellulose, giving plant cells their shape and structural support. It helps resist internal water pressure from the vacuole, keeping the cell from bursting and helping the plant stand upright. The membrane inside the wall controls what enters and exits the cell, while the nucleus and chloroplasts have other roles related to genetics and photosynthesis, not boundary formation.