Cell Theory and Endosymbiotic Theory

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What is the Cell Theory?

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The Cell Theory states that: 1) All living things are made of cells, 2) Cells are the basic unit of life, and 3) All cells come from pre-existing cells.

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Who proposed the Cell Theory?

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The Cell Theory was developed by scientists Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.

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What is a Prokaryote?

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A Prokaryote is a single-celled organism that lacks a nucleus and membrane-bound organelles, such as bacteria.

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What is a Eukaryote?

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A Eukaryote is an organism whose cells contain a nucleus and membrane-bound organelles, including plants, animals, and fungi.

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What is the Endosymbiotic Theory?

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The Endosymbiotic Theory suggests that certain organelles, like mitochondria and chloroplasts, originated from free-living bacteria that were engulfed by ancestral eukaryotic cells.

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What evidence supports the Endosymbiotic Theory?

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Evidence includes the presence of their own DNA, ribosomes, and double membranes in mitochondria and chloroplasts.

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What is the function of mitochondria?

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Mitochondria are known as the powerhouse of the cell, as they produce ATP through cellular respiration.

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What is the function of chloroplasts?

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Chloroplasts are responsible for photosynthesis, converting sunlight into chemical energy in plants.

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What is the significance of ribosomes?

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Ribosomes are the sites of protein synthesis in the cell, translating messenger RNA into proteins.

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What is a lysosome?

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Lysosomes are organelles that contain digestive enzymes to break down waste materials and cellular debris.