The "S" phase, known as the synthesis phase, is the portion of the cell cycle where DNA is replicated. The other stages listed do not contain DNA replication. G0 is a cell cycle arrest phase, where a cell remains dormant, awaiting signals to re-enter the cell cycle.

Caspases are proteases that initiate apoptosis. Procaspases are inactive caspases that are stored in the cell. Necrosis is when the cell body dies due to cell injury. Apoptosis is programmed cell death. The cell uses it to control the rate of cell division. Anaphase is a phase in the cell cycle in which the chromosomes are pulled to opposite poles of the cell.

Metaphase is defined when chromosomes move towards the equator of the cell.

Other answers refer to other stages of mitosis. Sister chormatids separate during anaphase, two distinct cells form during telophase, centrioles move towards opposite poles of the cell during prophase, and DNA replication happens during interphase.

During anaphase, the third stage of mitosis, the spindle fibers cause sister chromatids to break apart, and they are subsequently moved to opposite sides of the cell.

Chromosomes condense during prophase, align during metaphase, separate during anaphase, and are relocated during telophase.

Chromatids condense during prophase, the first stage of mitosis. This allows the abundant amount of DNA to be organized into relatively small and tightly packed structures that can be aligned and separated later in mitosis. This also signifies the conversion of the DNA from loosely packed euchromatin to tightly packed heterochromatin.

Chromosomes condense during prophase, align during metaphase, separate during anaphase, and are relocated during telophase.

Cytokinesis, the process of the cytosol splitting into two daughter cells, occurs during telophase, the last phase of mitosis. Chromosomes line up at the metaphase plate during metaphase, while the nuclear membranes disappear and the nucleolus dissolve during prophase.

During anaphase the sister chromatids are pulled apart by the mitotic spindle and move to opposite ends of the cell. The nuclear membrane begins to break down at the very end prophase and is completely deteriorated during metaphase, when the chromosomes align. It is still fully formed during early prophase. The membrane begins to reconstruct during telophase, but is not fully intact again until cytokinesis.

The S phase, which is when the cell duplicates its DNA, and the G1 phase, during which the cell grows, are phases of the cell cycle that are not involved in mitosis, known as interphase. The nuclear membrane is only disrupted during mitosis, and is thus intact during all stages of interphase.

During anaphase, the chromatids aligned on the equator of the cell are separated and pulled to opposite ends of the cell.

Prophase involves the condensation of chromatin into chromosomes and the removal of the nuclear envelope. The chromosomes align at the equatorial plate during metaphase and are pulled apart by the mitotic spindle fibers during anaphase. The chromatids begin to decondense during telophase, and the nuclear envelopes begin to form again.

The four mitotic stages included among these choices are prophase, metaphase, anaphase, and telophase, which occur in that order. The initial stage, prophase, involves chromosome condensation from chromatin and the formation of the spindle apparatus from microtubules. In metaphase, chromosome pairs line up in the center of the cell at a location called the metaphase plate. Anaphase involves the shortening of the microtubular spindle fibers, which forces chromosome pairs to migrate to opposite ends of the cell. Finally, telophase involves the formation of two new nuclei. Following telophase is cytokinesis, the final separation of the cytoplasm and other organelles of the two cells, and the sealing of the plasma membrane. Some references will include interphase, a period of rest, chromosome replication, and cellular checkpoints. Though not a part of mitosis itself, interphase separates successive mitotic divisions and acts as a time of cellular rest. In any case, the only properly matched definition above was that of telophase, the final stage of mitosis.

Centromeres are the areas of chromosomes where sister chromatids are associated. They also have the important function of serving as the attachment site for microtubules of the mitotic spindle. Centromeres are not made of protein or microtubules.