INTRODUCTION TO THE CELL

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Presentation transcript:

INTRODUCTION TO THE CELL pp. 69-78

LEVELS OF ORGANIZATION

HISTORY Hooke: observed cork

Leeuwenhoek: first to observe living cells

CELL THEORY All living things composed of cells. Cells are basic units of structure and function. Cells come from pre-existing cells

BASIC PARTS OF A CELL Cell membrane Genetic material (DNA) Ribosomes: make proteins Cytoplasm: surrounds the cell’s organelles

Cell Membrane: - Selectively permeable: controls what comes into and out of the cell - Made of phospholipids that form a lipid bilayer

Cell membrane has proteins peripheral: attached to the surface integral: embedded in the bilayer

Fluid mosaic model: cell membrane behaves more like a fluid than solid

Prokaryotic cells - Unicellular organisms - Oldest living type of cell

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