NEET BIOLOGY

Detailed explanation-1: -Bacterial flagella are filamentous organelles that drive cell locomotion. They thrust cells in liquids (swimming) or on surfaces (swarming) so that cells can move toward favorable environments.

Detailed explanation-2: -Pili or fimbriae are protein structures that extend from the bacterial cell envelope for a distance up to 2 m (Figure 3). They function to attach the cells to surfaces. E. coli cells can have up to 300 of these organelles.

Detailed explanation-3: -The bacterial flagellum is a motile organelle composed of thousands of protein subunits. The filamentous part that extends from the cell membrane is called the axial structure and consists of three major parts, the filament, hook, and rod, and other minor components.

Detailed explanation-4: -Flagella Function They help an organism in movement. They act as sensory organs to detect temperature and pH changes. Few eukaryotes use flagellum to increase reproduction rates. Recent researches have proved that flagella are also used as a secretory organelle.