Bacteria Morphology
The cell wall of

both have same thickness but composition is different
gram-positive bacteria are thicker than gram-negative bacteria
none of these
gram-negative bacteria are thicker than gram-positive bacteria

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Bacteria Morphology
The next to last step in peptidoglycan biosynthesis is

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

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