Bacteria Morphology
Periplasm is

the area outside the cell membrane that is influenced by the polymers
the interior portion of mitochondria
the area between the inner and outer membranes of Gram-positive bacteria
the area between the inner and outer membranes 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
synthesis of the NAM-peptide subunit
removal of the subunit from bactoprenol

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