Vocab: Basic Cell Types & Cell Theory

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Cell

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The basic unit of life.

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Organism

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Any living thing, from single-celled bacteria to multicellular humans.

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Cell Membrane

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A thin, flexible barrier around the cell that controls what enters and exits.

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Cytoplasm

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The gel-like fluid inside the cell where organelles are found.

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Organelle

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Specialized structures within a cell that perform specific functions.

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DNA (Deoxyribonucleic Acid)

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The genetic material found in all cells.

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Prokaryote

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An organism whose cells lack a nucleus and membrane-bound organelles.

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Nucleoid

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The region in a prokaryotic cell where DNA is concentrated.

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Ribosome

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The structure where proteins are made, found in both prokaryotic and eukaryotic cells.

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Cell Wall

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A rigid outer layer that supports and protects the cell, found in prokaryotes and some eukaryotes.