interphase most of the cell cycle (about 90%) cell metabolizes and performs its function inside the...
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![Page 1: INTERPHASE Most of the cell cycle (about 90%) Cell metabolizes and performs its function inside the organism Cell doubles everything in its cytoplasm –Increases](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649f575503460f94c7c7f5/html5/thumbnails/1.jpg)
INTERPHASE
• Most of the cell cycle (about 90%)
• Cell metabolizes and performs its function inside the organism
• Cell doubles everything in its cytoplasm– Increases the amount of
protein inside the cell– increases the number of
organelles– grows in size
• Chromosomes in the form of chromatin
![Page 2: INTERPHASE Most of the cell cycle (about 90%) Cell metabolizes and performs its function inside the organism Cell doubles everything in its cytoplasm –Increases](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649f575503460f94c7c7f5/html5/thumbnails/2.jpg)
Steps in Interphase
• G1– G = gap– Organelles double, cells grow in size…
• S– S = synthesis
• (DNA synthesis)
– Most important event is chromosome replication (occurs in nucleus)
• G2– Final preparation before division
![Page 3: INTERPHASE Most of the cell cycle (about 90%) Cell metabolizes and performs its function inside the organism Cell doubles everything in its cytoplasm –Increases](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649f575503460f94c7c7f5/html5/thumbnails/3.jpg)
PROPHASE• Early Prophase
– Chromosomes coil and condense to become visible
– Nucleoli disappears– Sister chromatids present
and held together by the centromere
– Spindle begins to form
• Late Prophase– Nuclear envelope breaks
down– Spindle attaches to the
centromeres and moves the chromosomes toward the center of the cell
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METAPHASE
• Spindle is completely formed
• The centromeres on the chromosomes are lined up on an imaginary equator between the poles
• The spindle is attached to each sister chromatid and this helps to keep the chromosomes in the center of the cell
![Page 5: INTERPHASE Most of the cell cycle (about 90%) Cell metabolizes and performs its function inside the organism Cell doubles everything in its cytoplasm –Increases](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649f575503460f94c7c7f5/html5/thumbnails/5.jpg)
ANAPHASE• The sister chromatids are
separated and now each is considered a daughter chromosome
• Motor proteins found on the centromeres move the chromosomes toward the opposite poles of the cell
• Spindle microtubules attached to chromosomes shorten
• Spindle microtubules that are not attached to chromosomes lengthen to elongate the cell and force the poles further apart in preparation for daughter cells