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U2L07 Cell Cycle
AP Biology - The Cell Cycle
| Question | Answer |
|---|---|
| The reproduction of cells. | cell division |
| A haploid reproductive cell, such as an egg or sperm. Gametes unite during sexual reproduction to produce a diploid zygote. | gamete |
| The complex of DNA and proteins that makes up eukaryotic chromosomes. When the cell is not dividing, chromatin exists in its dispersed form, as a mass of very long, thin fibers that are not visible with a light microscope. | chromatin |
| A modified type of cell division in sexually reproducing organisms consisting of two rounds of cell division but only one round of DNA replication. It results in cells with half the number of chromosome sets as the original cell. | meiosis |
| The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated. | S phase |
| The first stage of mitosis, in which the chromatin condenses into discrete chromosomes visible with a light microscope, the mitotic spindle begins to form, and the nucleolus disappears but the nucleus remains intact. | prophase |
| The fourth stage of mitosis, in which the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell. | anaphase |
| A structure present in the cytoplasm of animal cells that functions as a microtubule-organizing center and is important during cell division. A centrosome has two centrioles. | centrosome |
| An imaginary structure located at a plane midway between the two poles of a cell in metaphase on which the centromeres of all the duplicated chromosomes are located. | metaphase plate |
| A membrane-bounded, flattened sac located at the midline of a dividing plant cell, inside which the new cell wall forms during cytokinesis. | cell plate |
| A control point in the cell cycle where stop and go-ahead signals can regulate the cycle. | checkpoint |
| The phenomenon observed in normal animal cells that causes them to stop dividing when they come into contact with one another. | density-dependent inhibition |
| A mass of abnormal cells with specific genetic and cellular changes such that the cells are not capable of surviving at a new site and generally remain at the site of the tumor's origin. | benign tumor |
| The spread of cancer cells to locations distant from their original site. | metastasis |
Created by:
jtaylor422
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