Bacteria Morphology
Which of the following is not true about peptidoglycan?

None of these
It is present in prokaryotic cell wall
It occurs in the form of a bag shaped macro molecule surrounding the cytoplasm membrane
It is a polymer consisting of N-acetyl glucosamine, N-acetyl muramic acid and amino acids (alanine, lysine, etc.)

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Bacteria Morphology
Porins are located in

the cytoplasmic membrane of both gram-negative and gram-positive bacteria
the peptidoglycan layer of gram-positive bacteria
the periplasmic space of gram-negative bacteria
the outer membrane of gram-negative bacteria

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Bacteria Morphology
The next to last step in peptidoglycan biosynthesis is

cross-linking the peptide side chains of peptidoglycan
linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain
removal of the subunit from bactoprenol
synthesis of the NAM-peptide subunit

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