TEM of a group of Mitochondria in Maize

TEM of a group of Mitochondria in Maize

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Transmission electron micrograph of a group of mitochondria in the root tip of maize Zea mays. Mitochondria are the sites of cell respiration, the chemical process which uses molecular oxygen to oxidise sugars & fats in order to produce energy. The energy is stored as molecules of adenosine triphosphate (ATP), which are used to drive chemical reactions such as protein synthesis & to power movement of materials around the cell. Mitochondria are bounded by a double membrane, the inner one of which is folded to produce ingrowths called cristae, where the reactions of respiration occur. The matrix contains ribosomes & some DNA. Magnification: x60,000 (10x8"), x8600 (35mm size).

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Keywords: botanical science, botany, cell, cell respiration, cells, cristae, maize, mitochondria, mitochondrion, plant structure, respiration, root tip, zea mays

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