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Unit 6 Biology - Coggle Diagram
Unit 6 Biology
Cancer
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When altered or mutated, they become oncogenes and then can promote tumor formation or growth.
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Having a mutation in just one of the two copies of a particular proto-oncogene is enough to cause a change in cell growth and tumor formation.
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Growth arrest is where the cell stops growing due to mutation/damage, due to crowding, or lack of food.
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DNA Repair is when p53 finds a mutation and reports it to other proteins so that they can come and repair a mutation in the DNA.
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apoptosis is activated when p53 finds irreparable DNA damage, and there is no other way to maintain function other than to self-destruct.
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Types of DNA
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During telophase of mitosis, the chromosomes unwind back into regular DNA.
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. Once they get to a certain concentration in the cell, the cyclins bond to the CDKs.
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This means that whenever cyclin levels rise, mitosis occurs cyclin levels fall back down, and the cycle repeats.
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Hayflick limit
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as the cells divide, the telomeres(or caps on the end of the chromosomes) eventually shorten over time until they disappear.
with each division, some of the actual chromosome information will be lost,
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