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Cellular Respiration

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Introduction

Cellular Respiration - Set of the metabolic reactions and processes that take place in organisms' cells to convert biochemical energy from nutrients into ATP, and then release waste products. - The reactions involved in respiration are catabolic reactions that involve the oxidation of one molecule and the reduction of another. - It is the preferred method of pyruvate breakdown from glycolysis and requires that pyruvate enter the mitochondrion in order to be fully oxidized by the Krebs cycle. - Respiration --> provide energy. Chemical reaction needs energy - Energy is needed for respiration - No energy cant make more energy - Exothermic use up energy - Energy is locked in phosphate. - ATP-P-P --> ATP-P (xP): breaks off and releases energy The overall reaction of glycolysis is: D-Glucose Pyruvate + 2 NAD+ + 2 ADP + 2 ...read more.

Middle

THE ATP MOLECULES - ATP forms when chemical reaction release sufficient energy to bond a third phosphate group to ADP - ATP-P-P --> ATP-P (xP): breaks off and releases energy - adp + Pi + energy = ATP - ATP stores energy for the cell and releases it when energy is needed - ATP is the energy currency of the cell - The reaction if reversible and is catalysed by the enzyme ATPase - more energy is needed at higher temperature - THE FIRST PHASE IS CLALED GLYCOLYSIS AND TAKES PLACE IN THE CELL CYTOPLASM - Splitting 6C sugar to 2 x 3C sugars - THE SECOND PHASE IS CLALED THE LINK REACTION AND TAKES PLACE WITHIN THE FLUID MATRIX OF THE MITOCHONDRION. ...read more.

Conclusion

Cant leave them hanging around -hydrogen is picked up by NAD (H2) -NAD takes hydrogen to where it can produce ATP -PGAL takes a hydrogen...NAD takes a hydrogen becomes NADH2 -release phosphate -ADP picks up phosphate and become ATP -release water and phosphate Overview of aerobic respiration -One molecule of glucose is oxidised to TWO molecules of PYRUVIC ACID -(PYRUVATE0 in a process called GLYCOLYSIS -GLYCOLYSIS occurs in the cytoplasm -each pyruvic acid molecule diffuses into the fluid matrix of the mictocondrion Two pyruvic acid molecules are converted into two molecules of ACETYL COENZYME A in the LINK REACTION - acetyl CoA molecules are needed to drive the krebs cycle - krebs cycle involves the successive oxidation of acids and generates pairs of hydrogen atoms, CO2 and some ATP in the process - hydrogen pairs are carried to the critae of the mictononcdrion - ...read more.

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