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Hi, thank you for the explanation. If water is rushing into the cell wouldn't that mean that the cell would burst then (not shrivel as it says on p. 28)?
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On the MCAT when talking about hyper and hypotonic are we talking about the concentration of water or the concentration of solute relative to it's environment?
-The textbook (Biology 2 p. 28) says if the cell is hypotonic to it's environment, water will exit the cell, and it will shrivel, but I thought that hypotonic would have solute enter and the cell burst?
Thanks
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To my understanding: the three basic amino acids (Arginine, Histidine, and Lysine) are all positively charged at pH = 7, whereas the two acidic amino acids are negatively charged at pH = 7.
I am just confused on this though because I was under the impression that typically negatively charged molecules act as Lewis bases- ie. due to this negative charge they can act as electron donors (nucleophiles = positive charge loving). So if this negative charge is usually associated with a bases, how come the positive amino acids and basic and the negative amino acids are acidic? Wouldn't it be the reverse where the basic are (-) and the acidic are (+)?
I'm assuming that it's because we are talking about the Bronsted-Lowry definition of acid/ base but I am still finding this concept hard to fully grasp.
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For question 35 in introduction to organic chemistry: isn't there a ketone, and ether, and an ester in the product (not just an ester)?
-Ether = bonds to carbonyl and CHCH3 from the oxygen
-Ketone = carbonyl to two different functional groups
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I am confused on basic vs. molecular geometry. If molecular geometry only focuses on the atoms (not the electrons) why do the dash-wedge drawings include electrons (ie. trigonal pyramidal instead of tetrahedral)? Shouldn't this be the other way around (including electrons in drawings show electron repulsion effects)? I am looking at p. 117, section 2.5 (Molecular geometries and VSEPR Theory) of the 2020 classroom companion
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