Decide whether each of the following statements are true orfalse and explain why.
A. The structural polarity of all microtubules is such thatñ-tubulin is exposed at one end and ò-tubulin is exposed at theopposite end.
B. The role of ATP hydrolysis in actin polymerization is similarto the role of GTP hydrolysis in tubulin polymerization: both serveto weaken bonds in the polymer and thereby promotedepolymerization.
C. All microtubule organizing centers contain centrioles thathelp nucleate microtubule polymerization.
D. All proteins that bind to the ends of microtubules or actinfilaments cap the ends to prevent futher polymerization.
E. In most animal cells, minus end-directed microtubule motorsdeliver their cargo to the periphery of the cell, whereas plusend-directed microtubule motors deliver their cargo to the interiorof the cell.
F. Cadherins promote cell-cell interactions by binding tocadherin molecules of the same or closely related subtype onadjacent cells.
Lots of points offered. Please help.