Table of Contents
What lies outside of the cell membrane and provides support and protection to the cell?
The CELL WALL is found outside the cell membrane in plants and bacteria and provides support and protection.
How does the cell membrane on the exterior of the cell differ from the membranes that envelope organelles inside the cell?
The cell membrane is formed of phospholipids and proteins only. How does the cell membrane on the exterior of the cell differ from the membranes that envelope organelles inside the cell? Organelle membranes are not composed of a phospholipid bilayer.
Which of the following provides structural support for a cell?
The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.
Which is part of the cell separates the inside from the outside?
Cell Membrane (Plasma Membrane) The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable.
The cell membrane consists of two adjacent layers of phospholipids. The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 2).
Where are peripheral proteins found on the cell membrane?
For example, an integral protein that extends an opening through the membrane for ions to enter or exit the cell is known as a channel protein. Peripheral proteins are typically found on the inner or outer surface of the lipid bilayer but can also be attached to the internal or external surface of an integral protein.
How does the cell membrane protect the cell?
It protects the cell from the external environment. It protects and maintains the internal environment of the cell. The cell wall is metabolically inactive. The cell membrane is metabolically active. The cell wall grows in thickness over time. Further, it occupies the whole cell in the plant as the cell ages and dies.