Cairnleigh M. Dizon August 26, 2014 BSED 1A NAT SCI 1 CELLULAR RESPIRATION
-is the set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, releasing energy in the process as weak so-called "high-energy" bonds are replaced by stronger bonds in the products. Respiration is one of the key ways a cell gains useful energy to fuel cellular activity. Cellular respiration is considered an exothermic HYPERLINK "http://en.wikipedia.org/wiki/Redox" \o "Redox" redox reaction which releases heat. The overall reaction occurs in a series of biochemical steps, most of which are redox reactions themselves. Although technically, cellular respiration is a combustion reaction, it clearly does not resemble one when it occurs in a living cell due to slow release of energy from the series of reactions.
3 STAGES OF CELLULAR RESPIRATION GLYCOLYSIS
Glycolysis is the first of the three steps used to breakdown glucose to produce ATP. Glucose, a 6 carbon sugar, is split into two 3 carbon sugars. The 3 carbon sugars are then oxidized and their remaining atoms reaarranged to form two molecules of pyruvate. There are 2 distinct phases of Glycolysis:
1.PREPARATORY PHASE: Energy in glucose cannot be readily released unless energy from ATP if added first. In this phase, 2 ATP are added to the reaction, producing a glucose molecule with two phosphate groups. The phosphate groups make glucose less stable and ready for chemical...
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