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BSC 2010 Exam 4

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BSC 2010 Exam 4 Where do cells come from? - ✔✔Cells come from other cells through cell division Do all cells always divide? - ✔✔No, some cells only divide during growth periods Why do cells... divide? - ✔✔1) Grow 2) Development 3) Repair 4) Regeneration 5) Reproduction -> only reason single-celled organisms divide Cell division in Prokaryotes - ✔✔- All are single-celled - One chromosome - Circular DNA - Copied through replication Prokaryotes divide through ________ - ✔✔Binary fission Mitosis and Meiosis are not the same as _____ - ✔✔Binary fission Binary fission consists of - ✔✔Replicating the DNA and then extending the cell until it breaks and two cells are formed Can eukaryotic cells divide through binary fission? - ✔✔No, they are more complicated and have more than one chromosome and membrane bound organelles that need to be separated equally across the two new cells. How do organelles divide? - ✔✔1) membrane-bound organelles like mitochondria and chloroplasts divide on their own through a specific division process. 2) ER and Golgi don't divide, the process consists of the membrane constituents coming apart into small parts when the cell divides. It later reintegrates. How are the multiple chromosomes allocated throughout the cells? - ✔✔Eukaryotic cell divisions Meiosis - ✔✔It is mainly used for reproduction produces halves of the original chromosome number of cells. Mitosis - ✔✔Process commonly used for cell growth, repair and regeneration of other cells. What is the cell cycle? - ✔✔Tightly regul [Show More]

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