Final answer:
The statement regarding germ tube constriction is false. FtsZ proteins direct septum formation to separate bacterial daughter cells, not germ tubes.
Step-by-step explanation:
The statement 'A germ tube is constricted at its point of attachment to the mother cell' is False. In contrast, the FtsZ proteins are crucial in cell division, particularly in bacteria, where they direct the formation of a septum. The septum is a structure that will eventually form the new cell walls of the daughter cells. During this process, FtsZ proteins organize into a ring-like structure that recruits other proteins and materials necessary for the construction of the new plasma membrane and cell wall. This leads to the formation of the septum that separates the two daughter cells. Once the septum is fully formed, the cell pinches into two new cells, and the FtsZ proteins are then dispersed throughout the cytoplasm.