Cell Theory & Cell Basics

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Eukaryote

Back

True nucleus; a type of cell that has a nucleus enclosed within membranes.

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Cell Theory

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A fundamental concept in biology that states: 1) All living things are made of cells, 2) Cells are the basic unit of life, 3) All cells come from pre-existing cells.

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Prokaryote

Back

A type of cell that does not have a nucleus; examples include bacteria.

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Who proposed that all cells come from pre-existing cells?

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Virchow.

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Who was the first to observe that animals are made of cells?

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Schwann.

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What do all cells have in common?

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Cell membrane, cytoplasm, and DNA.

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What is the function of the cell membrane?

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It controls what enters and exits the cell.

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What is cytoplasm?

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The jelly-like substance inside the cell where organelles are found.

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What is the role of DNA in a cell?

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It contains the genetic information necessary for the growth, development, and reproduction of the organism.

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What distinguishes eukaryotic cells from prokaryotic cells?

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Eukaryotic cells have a nucleus, while prokaryotic cells do not.