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21 Cards in this Set
- Front
- Back
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As a cell grows, it ... |
places more demands on DNA, uses up food and oxygen more quickly, and has more trouble moving enough materials across its cell membrane |
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What does the speed with which wastes are produced by a cell depend on? |
the cell's volume |
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All of the following are problems that growth causes for the cells EXCEPT: a. DNA overload b. excess oxygen c. containing enough food d. expelling wastes |
b. excess oxygen |
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what happens when a cell divides? |
each daughter cell receives its own copy of the parent cell's DNA |
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when during the cell cycle are chromosomes visible? |
only during cell division |
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When during the cell cycle is a cell's DNA replicated? |
S phase |
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What occurs during interphase? |
the cell grows |
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During which phases of mitosis are centromeres and centrioles visible? |
prophase and metaphase |
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What is the first phase of mitosis? |
prophase |
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During which phase of mitosis do chromosomes line up along the middle of the dividing cell? |
metaphase |
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Order of mitosis |
prophase, metaphase, anaphase, telophase |
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role of the spindle in mitosis |
it helps separate the chromosomes |
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During normal mitotic cell division, a parent cell having 4 chromosomes will produce two daughter cells, each containing |
four chromosomes |
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What happens when cells come into contact with other cells? |
they stop growing |
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in eukaryotic cells, the timing of the cell cycle is regulated by... |
cyclins |
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Cancer
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a disorder in which some cells have lost the ability to control their growth rate |
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tumor |
a mass of cells formed by cancer cells |
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Totipotent cells |
cells that are able to develop into any type of tissue |
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Differentiation |
the process by which cells become specialized |
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Why do cells replicate their DNA before division? |
To preserve the original info for the daughter cells, each daughter cell needs a complete set of DNA |
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What is the shape of an animal cell? |
circular |
