Researchers investigating the mechanism of vesicular transport assembled a cell-free system that included microtubule tracks, vesicles, and ATP. However, they observed no movement of transport of vesicles in this system. What were they missing?
A) an axon
B) contractile microfilaments
C) intermediate filaments
D) motor proteins

Question

Quizplus · Accepted Answer

Motor proteins are necessary for vesicular transport along microtubule tracks. Without them, there would be no movement. Contractile microfilaments and intermediate filaments are not involved in vesicular transport. An axon may be involved in transport in cells, but it is not necessary for the cell-free system in this case.

Researchers Investigating the Mechanism of Vesicular Transport Assembled a Cell-Free