Question

Macrophage cells undergo a process called phagocytosis in which material is brought into a cell in the form of membrane vesicles and then transported along microtubules toward the cell center. Assuming that the centrosome is near the cell center, you can predict that these vesicles are moving to the _____ end of microtubules using the motor protein _____.

Answer 1

Answer:

The options

A. minus end; dynein

B. plus end; kinesin

C. minus end; kinesin

D. plus end; dynein

The correct answer is A.

A. minus end; dynein

Explanation:

Microtubules are well known as cytoskeletal fibers which plays a major part in the intracellular transport (transportation of vesicles inside the cell) and at the mitotic spindle in the course of mitosis.

The plus end of the microtubules goes via the outer edge or boundary of the cells which is not the same for the MINUS ENDS as they upheld within the centrosome.

Major proteins that aid vesicle’s movement are motor proteins:

• kinesin: is positive end coordinated

•  DYNEIN: is negative end directed

We can see that aside vesicles, these group of proteins plays a part too in organelles’ transportation going in opposite directions via the cytoplasm.