Results for "energy free"

BIOC 503 - MEMBRANE TRANSPORT

Cellular respirations • Oxygen atoms, being highly electronegative, pull shared electron pairs toward themselves when bound to carbon. • This electron movement is equivalent to carbon losing electrons. • The attachment of oxygen to carbon places electrons in a more stable configuration, releasing free energy. • Free Energy and Reaction: • Aerobic oxidation of glucose moves valence electrons from high free energy (glucose) to lower free energy (carbon dioxide and water). • Results in: • Decrease in potential energy. • Increase in entropy. • Reaction:  • Standard free energy change (): -2870 kJ/mol glucose under standard lab conditions (25°C, 101.3 kPa). • Cellular conditions yield : ~-3012 kJ/mol glucose. • Standard value of -2870 kJ/mol glucose is used for calculations. • Energy Release: • Burning glucose in a test tube releases energy as heat and light. • In cells: • About 34% of free energy is captured in molecules like ATP. • These molecules serve as energy sources for powering endergonic processes. This breakdown summarizes key points for understanding the aerobic oxidation of glucose and its biological significance.