Bacterial and Eukaryotic Flagella Mechanics

The video explains the differences in movement mechanisms between bacterial and eukaryotic flagella. Bacterial flagella use a rotary motor powered by protons or sodium ions, while eukaryotic flagella are powered by ATP and involve complex microtubule interactions. The video also demonstrates the physics of flagella movement and highlights the role of the central pair of microtubules in coordination.

What is the primary difference in the movement mechanism between bacterial and eukaryotic flagella?

• Both use concentration gradients for movement.

• Both use ATP for movement.

• Bacterial flagella use ATP, while eukaryotic flagella use concentration gradients.

• Bacterial flagella use concentration gradients, while eukaryotic flagella use ATP.

Which part of the bacterial flagella contains the rotary motor?

• Filament

• Hook

• Basal body

• Flagellum tip

What generates the torque in bacterial flagella?

• Glucose molecules

• Protons or sodium ions

• ATP molecules

• Oxygen molecules

How do bacterial flagella achieve complex movements?

• By changing the length of the filament

• By altering the concentration gradient

• By flipping the orientation of rotor proteins

• By increasing the number of flagella

What powers the movement of eukaryotic flagella?

• Concentration gradients

• ATP

• Glucose

• Sodium ions

Where are the protein motors located in eukaryotic flagella?

• At the base of the flagella

• Within the flagella itself

• In the cell nucleus

• Outside the cell membrane

What role do dynein proteins play in eukaryotic flagella movement?

• They force microtubules to slide past each other.

• They provide structural support.

• They anchor the flagella to the cell.

• They generate ATP for movement.

What happens when the cellular membrane is removed from a eukaryotic flagellum and exposed to ATP?

• The flagellum disintegrates.

• The flagellum changes direction.

• The flagellum beats normally.

• The flagellum stops moving.

What is believed to coordinate the movements of the nine outer doublets in eukaryotic flagella?

• The filament

• The basal body

• The central pair of microtubules

• The cell membrane

What is the consequence of lacking a central pair of microtubules in eukaryotic flagella?

• The flagella move faster.

• The flagella change color.

• The flagella become paralyzed.

• The flagella grow longer.