PLEASE HELP QUICK, 100 POINTS AND BRAINLIST. 1) A model of the cell cycle with checkpoints, cyclins, and CDK molecules is shown. Cyclins and CDKs are molecules that regulate the cell cycle. Checkpoints are specific portions of the cell cycle when the cell ensures proper growth, replication, and chromosome alignment before dividing. A cancer cell isolated from a tumor is found to have an improper number of chromosomes. Which scenario described below most likely results in a cancer cell with an improper number of chromosomes? A) The cancer cell ignored the G1 checkpoint. B) The cancer cell ignored the M checkpoint during mitosis. C) The cancer cell had excessive levels of cyclin E and CDK 2. D) The cancer cell had inadequate levels of CDK 1 and cyclin B.

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interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle