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CELL CYCLE, CELL DIVISION worksheet Your name: ________________________________ On each line, write the term that correctly replaces the underlined words in each sentence. cell cycle cytokinesis mitosis eukaryotic binary fission stem cell centromere daughter cells prokaryotic interphase sister chromatids ______________________ At the end of the cell cycle, the division of the cell’s nucleus occurs. ______________________ Until the sister chromatids in each duplicated chromosome separate during mitosis, they are held together by a protein ‘button’. ______________________ A chromosome is made up of two identical coiled strands of DNA. ______________________ Following mitosis, the division of a cell’s cytoplasm occurs. ______________________ Most cells go through a cyclical process of growth, development and division. ______________________ For most unicellular organisms, identified as those without a nucleus, the cell cycle might be as short as a few hours or a few days. ______________________ The cell cycle can be divided into two main phases – a period of growth and development and the mitotic phase. ______________________ Mitosis and cytokinesis result in the formation of two identical new cells. ______________________ For some cells, identified as those with membrane-bound nucleus, the cell cycle might take as long as one year. ______________________ Prokaryotic cell division is asexual reproduction producing two identical daughter cells. ______________________ A fertilized egg is a single undifferentiated cell. Name the levels of organization: cells < ____________________ < ______________________ < _______________________ < organism At what stage of the cell cycle are all the cell organelles and DNA duplicated? ________________________ What is the longest stage of interphase? ________________________ At what stage of the cell cycle are chromosomes visible? ________________________ At what stage of the cell cycle is cell division complete? ________________________ Only prokaryotes undergo cell division. T/F ________________________ Only eukaryotes undergo mitosis. T/F ________________________ Multicellular organisms are (eukaryotes/prokaryotes). ________________________ Unspecialized plant cells are called… ________________________ Draw the main phases or stages of the cell cycle as pie slices, each representing the proportional time of the phase. Name the phase and describe what happens in words. Draw each phase or stage of mitosis. Name the phase and describe what happens in words.