Cell Wall
Many types of prokaryotic and eukaryotic cell have a cell wall. The cell wall acts to protect the cell mechanically and chemically from its environment, and is an additional layer of protection to the cell membrane. Different types of cell have cell walls made up of different materials; plant cell walls are primarily made up of pectin, fungi cell walls are made up of chitin and bacteria cell walls are made up of peptidoglycan.
Read more about this topic: Subcellular, Structures Outside The Cell Membrane
Other articles related to "cells, cell walls, cell, wall, cell wall":
... Acid growth refers to the ability of plant cells and plant cell walls to elongate or expand quickly at low (acidic) pH ... This form of growth does not involve an increase in cell number ... During acid growth, plant cells enlarge rapidly because the cell walls are made more extensible by expansin, a pH-dependent wall-loosening protein ...
... The prokaryote cell is simpler, and therefore smaller, than a eukaryote cell, lacking a nucleus and most of the other organelles of eukaryotes ... The nuclear material of a prokaryotic cell consists of a single chromosome that is in direct contact with the cytoplasm ... A prokaryotic cell has three architectural regions On the outside, flagella and pili project from the cell's surface ...
... Bacterial morphology is determined by the cell wall ... Since the L-form has no cell wall, its morphology is different from that of the strain of bacteria from which it is derived ... Typical L-form cells are spheres or spheroids ...
... Although not truly unique, the cell walls of Archaea are unusual ... is a standard component of all bacterial cell walls, all archaeal cell walls lack peptidoglycan, with the exception of one group of methanogens ... There are four types of cell wall currently known among the Archaea ...
... It is based on the composition of their cell wall ... Gram staining uses crystal violet to stain cell walls, iodine as a mordant, and a fuchsin or safranin counterstain to mark all bacteria ... Gram status is important in medicine the presence or absence of a cell wall changes the bacterium's susceptibility to some antibiotics ...
Famous quotes containing the words wall and/or cell:
“The aim of every artist is to arrest motion, which is life, by artificial means and hold it fixed so that a hundred years later, when a stranger looks at it, it moves again since it is life. Since man is mortal, the only immortality possible for him is to leave something behind him that is immortal since it will always move. This is the artist’s way of scribbling “Kilroy was here” on the wall of the final and irrevocable oblivion through which he must someday pass.”
—William Faulkner (1897–1962)
“What Mrs. Thatcher did for women was to demonstrate that if a woman had enough desire she could do what she wanted, do anything a man could do.... Mrs. Thatcher did not have one traditional feminine cell in her body.”
—Julie Burchill (b. 1960)