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AP Biology || Cell Cycle Flashcards

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6004937829G0Cells like nerve and muscle cells that permanently lose the ability to divide and remains in this phase0
6004937830CyclinA kind of protein that regulates the cell cycle1
6004937831Internal RegulatorsProteins that make sure that that cell doesn't undergo mitosis until certain conditions are met2
6004937832External RegulatorsGrowth factors that have the ability to speed up, slow down, or stop the cell cycle3
6004937833G1(First Gap Phase) Cell enters this phase after completing mitosis. Cell increases in size and prepares to replicate CHECKPOINT: If the cell 1) is healthy 2) has enough resources If the DNA 1) Is undamaged Otherwise, cell dies or enters G0. Moves onto the S phase4
6004937834SDNA is synthesized thru replication5
6004937835G2(Second Gap Phase) Cell produces organelles and other stuff for the two new functioning daughter cells. CHECKPOINT: DNA fully replicated and checked for errors. Contains no damage. Cell can then enter mitosis and divide.6
6004937836InterphaseContains G1, S, and G2 Cell mostly spends time in this phase. Chromosomes replicate in preparation for cell division.7
6004937837MitosisContains PMAT Is the actual division of the nucleus Used for cell growth and repair in animals. Plants use it for growth or repair. 1n -> 1n or 2n -> 2n8
6004937838ProphaseChromosomes condense and become visible Nucleoli disappears Spindle fibers form Centrioles begin to migrate towards poles Nucleus membrane begins to disintegrate9
6004937839MetaphaseChromosomes line up, single file Centrosomes are at opposite poles Spindle fibers run from centrosomes to centromeres10
6004937840AnaphaseCentromeres of each chromosome separates and spindle fibers begin to pull the sister chromosomes apart Is the shortest phase of mitosis11
6004937841TelophaseChromosomes cluster at opposite ends of the cell Nuclear membrane re-forms Chromosomes unravel12
6004937842CytokinesisDivision of the cytoplasm13
6004937843Why do cells divide?As cells increase in volume, surface area decreases and the demand for material resources, limiting cell size14
6004937844Are larger cells or smaller cells more favorable?Smaller cells have a more favorable surface area-to-volume ratio, which is better for exchange of mater15
6004937845The cell cycle......switches between interphase and cell division16

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