Notes: Read it Flagella: 1. Long, slender, helical appendages 2. Responsible for bacterial motility 3. Propels bacteria through fluids 4. Essential for chemotaxis (directional movement) Types of flagella: 1. Monotrichous (single flagellum) 2. Lophotrichous (tuft of flagella) 3. Peritrichous (flagella all around) 4. Amphitrichous (flagella at both ends) Other options: a) Cilia: Short, hair-like appendages (not found in bacteria). b) Fimbrae (or fimbriae): Short, hair-like appendages for attachmen