Cell Organelles - Cell Membrane Typical Structure composed...

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Cell Membrane Typical Structure - composed of protein and lipid (fat) molecules Function - acts as a boundary layer to contain the cytoplasm (fluid in cell) - interlocking surfaces bind cells together - selectively permeable to select chemicals that pass in and out of cells Vacuole Structure - a single layer of unit membrane enclosing fluid in a sack Function - produces turgor pressure against cell wall for support - stores water and various chemicals - may store insoluble wastes Nucleus The nucleus consists of the nuclear envelope, nucleolus, chromatin, and nucleoplasm. Nuclear Envelope Structure -two unit membranes with a fluid-filled space -nuclear pores present -outer membrane may be continuous with endoplasmic reticulum Function -selectively permeable to control movement in or out -contains nuclear contents Chromatin Structure -composed of long thin strands of DNA Function -contains instructions that control cell metabolism and heredity
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Nucleolus Structure -non-membranous matrix of RNA (ribonucleic acid)
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