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Cell theory - Cell theory Smallest living thing Living...

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Cell theory Smallest living thing Living things are composed of cells Gametes—eggs and sperm in gonads—ovaries or testes Meiosis Mitosis—cloning,cells, recombination 200 types of somatic cells rbc has no nucleus, no need for nucleus some cells have more nucleus- skeletal muscle make up density of organelle animal cells 1—chromatin—in nucleus, DNA[genetic code],build protein types of chromatin heterachromatin u chromatin-- look up these two u chromatin—center region of the nucleus nucleolus structural set in nuclear envelope—border to nucleus [protective] phospholipids—nuclear envelope phoshoplipid bilayer has 2 layers envelop keeps enzyme from destroying genetic info **communication-transport nuclear pores let Mrna in and out of nucleus --steroid hormones—estrogen,testerone get in and out easily --escorted in and out escortin [helps get things in and out] Mrna—intercepted by first region out of nucleus is anchored by ribosomes Ribosomes—attach to message Mrna Ribosomes are located in cytoplasm and membrane of rough ER[rough webbing] made of phosolipid bilayer—it is a transport vesicle Bleb into transport vesicle
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