Bacteria Morphology
Periplasm is

the area outside the cell membrane that is influenced by the polymers
the area between the inner and outer membranes of gram-negative bacteria
the interior portion of mitochondria
the area between the inner and outer membranes of Gram-positive bacteria

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Bacteria Morphology
The next to last step in peptidoglycan biosynthesis is

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
cross-linking the peptide side chains of peptidoglycan

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