Which of the following bacterial structures is most directly linked to chemotaxis?

• A. Capsule
• B. Ribosome
• C. Flagellum
• D. Cell wall

Answer: (C)

Verified step by step guidance

1. Understand the concept of chemotaxis: it is the movement of an organism in response to a chemical stimulus, either toward attractants or away from repellents.
2. Identify the bacterial structures listed: Capsule, Ribosome, Flagellum, and Cell wall, and recall their primary functions.
3. Recall that the Capsule is mainly involved in protection and adherence, not movement.
4. Remember that Ribosomes are responsible for protein synthesis and do not contribute to motility.
5. Recognize that the Flagellum is a whip-like structure that enables bacterial motility, allowing the cell to move toward or away from chemical signals, thus directly linking it to chemotaxis.