Biology Forum › Cell Biology › Enzymes
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December 17, 2006 at 9:52 pm #6580
FromageParticipant"Like all catalysts, enzymes work by lowering the activation energy for a reaction and thus dramatically accelerating the rate of the reaction."
That’s what wikipedia says about enzymes. Could somebody give me a specific example or two of things that couldn’t happen without enzymes speeding up the process? I think that would make it easier for me to understand & remember. 😉
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December 17, 2006 at 9:58 pm #63129OscerotParticipant
Digestion, for one.
Without enzymes, the food would just sit in your stomach forever. Nothing would be broken down as a result; therein nothing would be absorbed by the body; therein you’d die.
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December 17, 2006 at 11:39 pm #63132FromageParticipant
So without enzymes digestion isn’t possible at all? Not even very slowly? Hmm…. didn’t know that. Thanks.
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December 18, 2006 at 12:06 am #63133OscerotParticipant
Digestion relies on enzymes.
There are carbohydrase enzymes, lipidase enzymes, and protein digesting enzymes which break down the food molecules. Without them, it would seem impossible to digest food.
Also, if I remember correctly, an enzyme is also responsible for the triggering of the mechanical digestion in the stomach of the food. "Pepsin" I believe the enzyme is called. It’s an allosteric enzyme.
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December 18, 2006 at 12:45 am #63134kjleParticipant
well chemical digestion would be impossible, but don’t forget mechanical digestion, i.e. stomach churning, chewing food, etc.
But in reality, there’s no way that mechanically everything could be broken down small enough to be absorbed.
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December 18, 2006 at 1:58 am #63139OscerotParticipant
Isn’t mechanical digestion triggered by Pepsin, which is an enzyme itself?
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December 18, 2006 at 2:24 pm #63190sdekivitParticipantquote Oscerot:Isn’t mechanical digestion triggered by Pepsin, which is an enzyme itself?
no pepsin doesn’t trigger mechanical breakdown, that does the nervous system in respons to seeing, smelling and tasting food before it enters te stomach.
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December 18, 2006 at 4:47 pm #63202sachinParticipant
Enzymes are mediators of biological system …….
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December 18, 2006 at 4:52 pm #63205DustfingerParticipant
Enzymes are biological catalysts ?
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December 18, 2006 at 5:09 pm #63209sachinParticipant
Ya, thats rigght…..
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December 18, 2006 at 5:13 pm #63211DustfingerParticipant
I know ! 😉
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December 18, 2006 at 5:16 pm #63212sachinParticipant
Gheeeee………….Whats funny?????????
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December 18, 2006 at 5:17 pm #63213DustfingerParticipant
Everything is funny.
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December 18, 2006 at 5:21 pm #63216sachinParticipantquote Dustfinger:Everything is funny.
Then.. 😆 😆 😆 😆 😆
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December 18, 2006 at 5:22 pm #63217DustfingerParticipant
😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆
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December 18, 2006 at 5:23 pm #63218sachinParticipantquote Dustfinger:😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆
😈 😈 😈 😈 😈 😈 😈 😈 😈
Ya I agree that Dusty is Funny…
😆 😆 😆 😆 😆 😆 😆 😆 😆 -
December 18, 2006 at 5:25 pm #63220DustfingerParticipantquote sachin_at_biog:quote Dustfinger:😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆
😈 😈 😈 😈 😈 😈 😈 😈 😈
😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆 😆😆 😆 😆 😆 😆 😆 😆 😆 😆
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December 18, 2006 at 9:13 pm #63241PoisonParticipant
Excuse me are you people OK?
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December 19, 2006 at 5:07 am #63287sachinParticipantquote Poison:Excuse me are you people OK?
Some times Scientists Go CRACK
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December 22, 2006 at 10:27 pm #63671PoisonParticipant
Can be seen clearly… 😯
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December 23, 2006 at 10:45 am #63738destinyParticipantquote sachin_at_biog:quote Poison:Excuse me are you people OK?
Some times Scientists Go CRACK
I don’t believe that scientists would actually go crack but now I do believe. 😯 😮 Haha.
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January 8, 2007 at 1:58 pm #65085DustfingerParticipantquote Poison:Excuse me are you people OK?
Yes. Are you, by the way ? 😉
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