Question

which phrases accurately describe the role of microtubules in the cell cycle? select the two answers that are

□ organization of the chromosomes
□ migration of the chromosomes
□ disassembly of the nuclear membrane
□ replication of the chromosomes
□ separation of the cell cytoplasm

Explanation:

Microtubules form the spindle fibers which organize chromosomes at the metaphase plate (organization) and pull them apart during anaphase (migration). Nuclear membrane disassembly is due to phosphorylation of lamin proteins. Chromosome replication occurs in S - phase via DNA polymerases. Cytokinesis (separation of cytoplasm) in animal cells is by actin - myosin contractile ring and in plant cells by cell plate formation, not microtubules (though microtubules help in cell plate orientation but the main separation mechanism is different).

Answer:

organization of the chromosomes, migration of the chromosomes