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Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | Chemical work, transport work, mechanical work.
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| show | The pushing of endergonic reactions that would not occur spontaneously. Examples: Synthesis of polymers to monomers. (Building monomers to make polymers)
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| show | The pumping of substances across membranes against the direction of spontaneous movement. Example: Transport of molecules across membrane
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| What is mechanical work? Example? | show 🗑
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| What is energy coupling? | show 🗑
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| What is the role of Atp in energy coupling? | show 🗑
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| What is Atp composed of? | show 🗑
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| show | Molecule of inorganic phosphate leaves Atp, which becomes adenosine diphosphate, or Adp.
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| What is the change of free energy regarding converting Atp to Adp? (measured under standard conditions) | show 🗑
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| show | Atp + H2O -> Adp + inorganic phosphate
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| What is the change of free energy regarding converting Atp to Adp under cellular conditions? (which is not standard conditions due to reactant and product concentrations differing from 1 M) | show 🗑
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| Why is Atp so useful to the cell? | show 🗑
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| show | Heat is released to surroundings. Beneficial because when shivering, Atp is hydrolyzed during muscle contraction to generate heat and warm body.
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| show | :)
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| show | Cell's proteins harness energy released during Atp hydrolysis directly to drive chemical reactions that, by themselves, are endergonic.
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| show | :)
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| show | Transfer of phosphate group from Atp to some molecule, such as reactant. Recipient with phosphate group covalently bonded to it is called phosphorylated intermediate, more reactive (less stable) than original unphosphor. molecule
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| *Note* Transport and mechanical work in cell are also nearly always powered by hydrolysis of Atp | show 🗑
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| show | protein changes shape and changes its ability to bind another molecule.
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| show | Atp phosphorylates transport protein that controls flow of solute, causing protein to change shape. Opens downward when phosphor, releases solute by opening upward when unphosphor. (original shape).
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| Example of phosphorylation with mechanical work? | show 🗑
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| show | It is renewable resource, regenerated by addition of phosphate of Adp
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| show | Comes from the exergonic breakdown reactions (catabolism) in cell
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| show | :)
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| show | Working muscle cell recycles its entire pool of Atp in less than minute. Represents 10 million molecules of Atp consumed and regenerated per second per cell.
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| What provides energy for formation of Atp by adding phosphate group to Adp? | show 🗑
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Created by:
chelseawillia