Bacteria Morphology
The next to last step in peptidoglycan biosynthesis is

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
cross-linking the peptide side chains of peptidoglycan

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Bacteria Morphology
Flagella move the cell by

an individual flagellum beating in a whip-like motion
spinning like a propeller
attaching to nearby particles and contracting
many flagella beating in a synchronous, whip-like motion

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