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Transcript of Biology
-ribosomes (bacterias) (peptidoglycan) (circular piece of DNA) Animal cell Plant cell cell membrane
nucleus: -nuclear envelope - nuclear lamina (chromatin,nucleolus) cell wall(celulosis)
nucleus: -nuclear envelope -nuclear lamina (chromatin,nucleolus) cell membrane fluid mosaic model phospholipid bilayer with embedded proteins functions:
-gives individuality to a cell
-controls the molecular and ionic cell structure
-membrane transport : passive transport (diffusion and osmosis)
active transport (transmembrane protein channels and transpoters)
endocytosis and exocytosis CELL BIOLOGY Cell compounds CITOPLASM matter between the cell membrane and nucleus
citosol-liquid compound of a cel
organelles Organelles Endoplasmic reticulum a system of membranes
there are two types ER:rough ER and smooth ER
Function:Rough ER- translation and folding a new protein SmoothER - expression of lipids rough ER:covered with ribosomes;has folds that are flat sacs
smooth ER:folds are tubular Golgi apparatus one of the first organelles to be discovered and observed in detail
composed of stacks of membrane-bound structures known as cisternae
function:sorting, packaging, processing and modification of proteins