Final answer:
Kinesin facilitates the movement of vesicles along an axon in the anterograde direction, from the cell body towards the axon terminal. Option 1 is correct..
Step-by-step explanation:
Kinesin facilitates the movement of vesicles along an axon in the anterograde direction, which is from the cell body towards the axon terminal. Powered by ATP, kinesin acts as a motor protein that walks along microtubule tracks, carrying the vesicles with it.
On the other hand, the motor protein dynein is responsible for the retrograde transport, moving empty vesicles and other materials back toward the cell body, also utilizing ATP for energy.The question specifies four choices for kinesin's directional movement, and based on the provided information, the correct answer is: 1) Anterograde direction (from the cell body towards the axon terminal). Kinesin does not facilitate bidirectional movement; instead, it is specialized for one direction whereas dynein moves materials in the opposite direction.