End of focus question 7.25

Arrhenius Equation:

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Rida Ismail 2E
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Joined: Sat Sep 07, 2019 12:16 am

End of focus question 7.25

Postby Rida Ismail 2E » Thu Mar 12, 2020 6:41 pm

Can someone please help me on end of focus problem 25

25. Vision depends on the protein rhodopsin, which absorbs light in the retina of the eye in a reaction in which one form, metarhodopsin I, is converted to another, metarhodopsin II. The half-life of this reaction in cattle eyes in 600microseconds at 37 degrees Celsius but 1 second at 0 degrees Celsius, whereas in frog eyes the same process had a half-life that differs by a factor of only 6 over the same temperature range. Suggest an explanation and speculate on the survival advantages that this difference provides the frog.

Thank you!

MingdaH 3B
Posts: 133
Joined: Thu Jul 11, 2019 12:17 am

Re: End of focus question 7.25

Postby MingdaH 3B » Thu Mar 12, 2020 6:53 pm

Frogs are cold blooded, so that, even with a great difference in temperature, since their own body temperatures won't compensate for a very cold environment, this reaction still has to occur for them to have vision, and so a reaction rate that has as small of a difference as possible would be evolutionarily favorable.


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