Question

.10 Which of these is not a part of murein?
A) Polysaccharides
C) Glycans
B) Amino acid chains
D) Proteins​

Answer 1

Explanation:

amino acid and chains is ur answer

Answer 2

(b) Amino acid chains is not a part of murein.

Explanation:

• Peptidoglycan or murein is a polymer consisting of sugars and amino acids that forms a mesh like layer outside the plasma membrane of most bacteria forming the cell wall.
• Peptidoglycan is also involved in binary fission during bacterial cell reproduction.
• The term peptidoglycan was derived from the peptides and the sugars (glycan) that make a molecule.
• It is also called murein or mucopeptide. This is a complex interwoven network of sugar polymer and amino acids that surrounds the entire bacterial cell.
• The sugar component consists of alternating residues of β-(1,4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM).
• Peptidoglycan is the basic unit of the cell wall in bacteria which confers mechanical rigidity to the cell protects the cytoplasmic membrane and determines the cell form.
• The periplasmic murein (peptidoglycan) sacculus is a giant macromolecule made of glycan strands cross linked by short peptides completely surrounding the cytoplasmic membrane to protect the cell from lysis due to its internal osmotic pressure.
• Amino acids are small molecules that are the building blocks of proteins. Proteins serve as structural support inside the cell and they perform many vital chemical reactions. Each protein is a molecule made up of different combinations of 20 types of smaller, simpler amino acids.