While using electron microscopy to examine the cell membrane of a bacterium, you have discovered the presence of a complex motor protein assembly.You do not find any evidence of a proper flagellum.You can conclude that the bacterium most likely has lost its ability to make
A) flagellin.
B) tubulin.
C) actin.
D) keratin.
E) myosin.

Question

Quizplus · Accepted Answer

The presence of a complex motor protein assembly suggests that the bacterium may have been capable of locomotion using a flagellum. However, the absence of a proper flagellum suggests that the bacterium has lost its ability to synthesize flagellin, the protein component of the flagellum. Therefore, choice A is the best answer. The other choices (B, C, D, and E) are not directly related to flagellum synthesis.

While Using Electron Microscopy to Examine the Cell Membrane of a Bacterium