NEET Biology: Types of movement-fiagellar Practice Questions
15 free multiple-choice questions on Types of movement-fiagellar (Locomotion and Movement) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Which arrangement describes flagella that are distributed over the entire surface of the bacterial cell?
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Correct answer: C — Peritrichous
Peritrichous arrangement means the flagella are distributed all over the surface of the bacterial cell, which aids in comprehensive swimming.
Q2. The rotation of the flagellar filament generates the force necessary for movement. This process is primarily driven by which mechanism?
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Correct answer: B — Mechanical linkage
While the actual energy source is complex, the movement is mechanically coupled through the rotation generated by the motor complex. (This avoids specifying the PMF directly as the sole answer for the rotation force).
Q3. What is the primary role of the basal body in a bacterial flagellum?
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Correct answer: A — Providing energy for flagellar rotation
The basal body acts as the motor, connecting the flagellum to the cell membrane and housing the necessary components for generating the rotation and movement.
Q4. Which arrangement of flagella is characteristic of a bacterium that swims in a straight line using a single polar flagellum?
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Correct answer: D — Monotrichous
Monotrichous arrangement refers to a single flagellum situated at one pole, enabling unidirectional movement along a straight path.
Q5. Flagella are typically composed of which type of protein structure?
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Correct answer: A — Flagellin
The flagellum is built upon the structure of the external microtubule doublets, which are composed of tubulin, forming the axoneme structure.
Q6. In the structure of a bacterial flagellum, the motor functions to generate torque. Which part is responsible for converting the energy into rotational motion?
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Correct answer: C — Basal body
The basal body, which anchors the flagellum to the cell envelope, contains the components necessary to drive the rotation, acting as the motor assembly.
Q7. The attachment mechanism between the hook and the filament is crucial for bending and movement. This connection is mediated by which element?
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Correct answer: A — Lipid bilayer
The hook acts as a universal joint, allowing the rotation of the basal body to be translated into the bending motion of the filament.
Q8. Which structure acts as the basal body, the base from which the flagellar motor is anchored?
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Correct answer: A — Basal body
The basal body is the complex structure embedded in the cell envelope that houses the rotor machinery for flagellar rotation.
Q9. The sliding of adjacent microtubule doublets, which drives the bending motion of the flagellum, is powered by which type of protein movement?
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Correct answer: A — ATP-dependent sliding of dynein motors
Movement of the flagellum is achieved by the relative sliding of the microtubule doublets, which is powered by the action of dynein motor proteins using ATP.
Q10. The motor protein responsible for the rotation and movement of the bacterial flagellum is embedded in which structure?
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Correct answer: B — Basal body
The basal body is the complex structure anchored in the cell envelope that provides the necessary attachment and motor function for flagellar movement.
Q11. Which organism typically possesses a single, long, whip-like flagellum for propulsion?
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Correct answer: D — Trypanosoma
Trypanosoma, a parasitic protozoan, is known for possessing a single flagellum used for motility in its environment.
Q12. Which type of movement is primarily associated with the rotation of flagella in bacteria used for swimming or propulsion?
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Correct answer: B — Rotational movement
Flagellar movement, which facilitates propulsion in bacteria, is often described as a rotational motion where the entire flagellum spins, generating thrust.
Q13. The rotation of the flagellum is powered by the proton motive force. This energy is harnessed by which type of protein motor?
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Correct answer: A — Rotary motor complex
The rotation is driven by a complex of proteins (like MotA/MotB) that couples the energy from the proton motive force to the rotation of the flagellar motor.
Q14. If the rotational direction of the flagellar motor is reversed, what type of movement pattern is typically observed in the bacterium?
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Correct answer: B — Tumble motion
Reversing the rotation often leads to the characteristic 'tumble' motion, a deviation from smooth swimming, which is a regulated movement pattern.
Q15. Which type of bacterial arrangement is characterized by a single flagellum located at one pole of the cell?
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Correct answer: B — Monotrichous
Monotrichous arrangement refers to the presence of a single, isolated flagellum at one end of the bacterium.
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