Which of the following statement(s) is/are correct ?
P. The kinetochore is a specialized attachment site for microtubules located at the chromosome centromere it binds to the plus end of microtubules.
Q. A GDP cap at the end of a microtubule will cause it to depolymerize.
R. The plus ends of flagellar microtubules point toward the basal body.
S. Kinesin moves proteins from the minus to the plus end of microtubules.