Question

define cell wall in 5 points​

Answer 1

Answer:

# A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane.

# It can be tough, flexible, and sometimes rigid.

#It provides the cell with both structural support and protection, and also acts as a filtering mechanism.

# Cell walls are present in most prokaryotes (except mollicute bacteria), in algae, fungi and eukaryotes including plants but are absent in animals.

#A major function is to act as pressure vessels, preventing over-expansion of the cell when water enters.

Answer 2

Answer:

• A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane.
• It can be tough, flexible, and sometimes rigid.
• It provides the cell with both structural support and protection, and also acts as a filtering mechanism.
• Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids.
• Bacterial cell walls are different from the cell walls of plants and fungi which are made of cellulose and chitin, respectively.