Mitochondria 2
Mitochondria are tiny organelles found in nearly all eukaryotic cells. They are rather large organelles ranging from 0.5µm to 10µm in length and 1µm in diameter. The mitochondria are the energy factories of the cell and are located in the cytoplasm. They are the sites of cellular respiration. The mitochondria are responsible for generating ATP from such organic fuels as simple sugars and fats in the process of cellular respiration. This doubled-membrane organelle has its own DNA and can reproduce by splitting itself.The mitochondria are sausage-shaped structures that move, change their shape and divide. They are distinct organelles with two membranes, the inner membrane and the outer membrane. The outer membrane is smooth and limits the organelle. It is highly permeable to small solutes such as molecules and ions, but it blocks off passages of proteins and other macromolecules. The inner membrane of the mitochondria is folded into shelf like structures called cristae. The cristae does not even allow the passage of small ions and so it maintains a closed space within the cell. The many infoldings of the cristae are resp
The mitochondrial matrix contains enzymes that catalyse many metabolic steps of cellular respiration. Some enzymes are actually embedded in the inner membrane. The second stage of cellular respiration, the Krebs cycle, converts pyruvic acid into carbon dioxide, and this takes place within the matrix of the mitochondria. In the Krebs cycle, the three carbon fragments are broken down into one carbon molecules of carbon dioxide. One ATP is produced for each three-carbon molecule. More NADH is also made during the Krebs cycle. The second and third stages of cellular respiration are the citric acid cycle (Krebs Cycle) and the electron transport chain. Unlike glycolysis, these stages are aerobic. This means that oxygen must be present for them to occur. The intermembrane space reflects the solute composition of the cytosol, because the outer membrane is permeable to small solute molecules. it has its own small group of enzymes, because the o outer membrane is not permeable to macromolecules. The final stage of cellular respiration is the electron transport chain which produces most of the ATP and is built into the cristae of the mitoc
Some common words found in the essay are:
Mitochondria Mitochondria, NADH Krebs, Krebs Cycle, ATP Muscle, NADH Glycolysis, cellular respiration, inner membrane, krebs cycle, outer membrane, stage cellular respiration, stage cellular, carbon dioxide, electron transport, membrane outer, contain mitochondria, membrane outer membrane, inner membrane outer, outer membrane permeable, nadh glycolysis, electron transport chain,
Approximate Word count = 775
Approximate Pages = 3 (250 words per page double spaced)
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