Recent content by Iainios

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    Potential energy and ATP synthesis

    Hi Nobahar, Your very close. OK, firstly, you wondered where the kinetic energy comes from: it is the thermal energy. The higher the temperature, the more kinetic energy the molecules have and vice versa. Secondly, the ATPase in mitochondrial membranes is not a uni-directional gate. The only...
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    Biology research - do ppl have to argue for how relevant+interesting it is?

    No, Ebola is not a protist. Jacques Monod's nobel prize winning work involved understanding the mechanisms of genetic regulation in E. coli. By studying a simple sysyem, he uncovered principles which vastly facillitated the understanding of more complex systems, coining the truism "What is...
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    Biology research - do ppl have to argue for how relevant+interesting it is?

    Hi Simfish, I'm not sure what this question is doing on the physics forums, but here goes. Most the time, the model organism is chosen for biological reasons alone. Certain organisms are very popular. The fruit fly is often chosen because it reproduces quickly and its easy to get a quick...
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    Potential energy and ATP synthesis

    Hi Nobahar. This question bothered me for a while too, until I read chapter 7 of Nelson's 'Biological Physics'. One way of looking at this, the abstract way, is to think about the number of ways in which the particles can be spread out in a smaller volume compared to a larger volume. The...
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    Mathematical Enzyme

    Not all enzymes have such dramatic mechanical motions. Kinases are good examples. They takes a phosphate group from ATP and attaches it to one of the side chains (aka 'R groups') on another protein, the substrate: Here, the enzyme activity isn't as mechanical, its chemical. The substrate...
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