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Cell Biology

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Cell Biology

A cell is chemical system that is able to maintain its structure and reproduce. Cells are the fundamental unit of life. All living things are cells or composed of cells.

2

The interior contents of cells is the cytoplasm. The cytoplasm is isolated from the surrounding environment by the ______ ______ . There are two fundamentally different forms of cells.

__________ cells -

relatively simple cells - lack nuclear membrane and many organelles - bacteria and their relatives are all prokaryotic

___________ cells - more complex cells - have a nucleus and many organelles - all cells of plants, animals, fungi, and protists

3

Most cells are small Prokaryotic: 1-10 µm Eukaryotic: 10 - 100 µm (1 µm = .001 mm)

Cells and organelles

4

Organelles, Macromolecules, & Atoms

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