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ATP. powers cellular work by coupling exergonic reactions to endergonic reactions. a cell does 3 kinds of work: chemical, transport, mechanical. To do work, cells manage energy resources. by energy coupling. ATP is composed of. ribose, adenine, and three phosphate groups. Hydrolysis.
couple reaction that consists of TWO reactions. Requires 27 kJ + hydrolysis of ATP releases 30 kJ so it works out. first reaction: glucose is phosphorylated + becomes the shared intermediate. this is energy releasing because ATP is that unstable w/ its 3 phosphates. second reaction: glucose-P reacts w/ fructose - > sucrose. this releases energy ...
Study with Quizlet and memorize flashcards containing terms like What is ATP?, What is the structure of ATP?, How would you describe the energy of ATP? and more.
In the first reaction, a phosphate group is transferred from ATP to glucose, forming a phosphorylated glucose intermediate (glucose-P). This is an energetically favorable (energy-releasing) reaction because ATP is so unstable, i.e., really "wants" to lose its phosphate group.
Cells couple the exergonic reaction of ATP hydrolysis with the endergonic reactions of cellular processes. For example, transmembrane ion pumps in nerve cells use the energy from ATP to pump ions across the cell membrane and generate an action potential.
ATP couples exergonic and endergonic reactions. As you have just seen, the hydrolysis of ATP is exergonic and yields ADP, P i, and more free energy (or AMP, PP i, and more free energy). The reverse reaction, the formation of ATP from ADP and P i, is endergonic and consumes as much free energy as is released by the hydrolysis of ATP:
atp transfers one of its phosphates to the pump and forms adp and the pump is the phosphorylated intermediate. Study with Quizlet and memorize flashcards containing terms like atp, atp structure, bonds between phosphate groups (in atp) and more.
