What Appears to Be Responsible for the Tighter Cohesin-Mediated Adhesion

Multiple Choice

What appears to be responsible for the tighter cohesin-mediated adhesion between chromosomes seen at centromeres rather than along the chromosome arms?

A) elevated phosphorylation
B) a kinase found at the centromere that phosphorylates cohesin
C) a phosphatase found at the centromere that removes phosphate groups from cohesin
D) a phosphatase found in the chromosome arms that removes phosphate groups from cohesin
E) a phosphatase found in the chromosome arms that adds phosphate groups to cohesin