Final answer:
A translocase or transport system is the carrier molecule that transports peptidoglycan subunits across the bacterial membrane for incorporation into the growing cell wall.
Step-by-step explanation:
The carrier molecule required to transport peptidoglycan subunits to the location where they will be incorporated into the growing bacterial cell wall is known as a translocase or transport system. These proteins in the membrane play a crucial role in the process of transport, facilitating the movement of these large molecules across the bacterial membrane, often using active transport that requires cellular energy.
Peptidoglycan, the major component of bacterial cell walls, consists of polymers of alternating N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) subunits. These subunits are linked by peptide chains that give the bacterial cell wall its rigidity and strength. The transport of peptidoglycan across the membrane is essential for the growth and maintenance of the bacterial cell wall, particularly during cell division.