what's the difference between a cell wall and a cell membrane?

Question

in microbiology, some bacteria have cell walls and some don't. which type has them, and how do you know?

Answer 1

Bacteria have cell walls and cell membranes.

The cell membrane, also called the plasma membrane, is just inside the cell wall. It is flexible, made of a bilayer of phospholipids, and has the job of determining what can enter and leave the cell.

The cell wall is just outside the plasma membrane. It is fairly rigid, and it has the job of giving structure and support to the cell.

Are you thinking of the extra layer of lipids outside the cell walls of some bacteria. That extra layer resists the purple dye of gram staining, so those bacteria with the extra layer are "gram-negative". They don't turn purple in a gram stain.

Answer 2

Cell wall provides structure and the cell membrane allows protection as well as selective diffusion of substances into the cell. The cell wall is located outside of the cell membrane and only in plant cells. Animal cells do not have a cell membrane.

Answer 3

A cell wall is a fairly rigid layer surrounding a cell located outside of the cell membrane that provides the cell with structural support and protection.They provide rigidity to the cell for structural and mechanical support, maintaining cell shape, the direction of cell growth,The cell wall also prevents expansion when water enters the cell.Cell walls protect against pathogens in the environment

The cell membrane (also called the plasma membrane or plasmalemma) is a semipermeable lipid bilayer common to all living cells. It contains a variety of biological molecules, primarily proteins and lipids, which are involved in a vast array of cellular processes.The cell membrane surrounds the cytoplasm of a cell and physically separates the intracellular components from the extracellular environment, there by serving a mechanical function similar to that of skin.

Answer 4

A cell wall is a rigid wall that protects the cells of all plants and I think all bacteria (otherwise they would squish). A cell membrane is the outer coating of animal cells and the layer inside the cell wall if there is one, and it controls what goes in and out of the cell.

Answer 5

Plant cells have cell walls...they're more rigid and help the plant maintain its shape, even if there is less water in the cell. The membrane recedes, but the wall remains in place.

Answer 6

all cells have cell membranes, but only plant cells have cell walls
a cell membrane keeps all the good stuff in and bad stuff out, while providing protection
a cell wall is basically a backbone for a plant cell and keeps it sturdy, (that's also the fiber)

Answer 7

a cell wall is only present in plant cells, as it is made of cellulose to give the plant a firm shape. plants need this support, as they do not have a skeletal system.

a cell membrane is present in animal and plant cells. it ia a partially permeable layer that controls the movement of substances in and out of the cell.

Answer 8

cell wall is in a plant cell and a cell membrane is in a animal cell