Bacteria Morphology
Which is most likely to be exposed on the surface of a gram-negative bacterium?

Protein involved in energy generation
Phospholipids
Pore protein (porin)
Lipoteichoic acid

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Bacteria Morphology
The next to last step in peptidoglycan biosynthesis is

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

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