Question

Bacterial flagella are chemically composed of pure __________________ (a type of polymer), and the polymer is known as _____________________.

Answer 1

Protein, flagellin

Bacterial flagella are chemically composed of pure protein (a type of polymer), and the polymer is known as flagellin.

Bacterial flagella are whip-like appendages that extends from the cell body of certain bacteria. Bacteria mainly use the flagella for movement and it can also be used as a sensory organelle. Flagella have different structure, protein component and mechanism of propulsion. The bacterial flagella are helical shaped, thick hollow tubes that are chemically composed of the protein flagellin.

Answer 2

Of the following given choices;

A. Carbohydrates, Starch

B. Nucleotides, DNA

C. Fats, Oleic acids

D. Protein, Flagellin

The answer is; D.

The protein flagellin is a globular protein. When the units bond in sequence, they form a hollow filament shaped like a helical screw. It propels the bacteria by rotating like a motor powered by proton motive force.