dehydration and hydrolysis reactions
- September 25, 2005 at 5:53 pm #1980
I have this list of things I need to know for my Biology test, and there are two questions that I am not sure about. I just want to make sure that I understood the question correctly and that I got the right answer.
1. Understand condensation reaction to polymerize monosaccharies, disaccharides, and polysaccharides.
Dehydration (condensation) Reaction – two molecules are covalently bonded to each other through a loss of water molecule.
• When a bond forms between two monomers, each monomer gives part of the water molecule that is lost. One provides hydroxyl group (-OH), and another provides hydrogen (-H)
• In order to polymerize monosaccharides, disaccharides, and polysaccharides, such reaction ^ is repeated as monomers are added to the chain by one.
• The cell must have a lot of energy in order to make so many dehydration reactions, and enzymes help the cells to it.
2. Understand hydrolysis of hydrocarbons to monosaccharids
Hydrolysis: reverse of dehydration reaction; to break with water.
Bonds between monomers are broken by the addition of water molecules.
Since monosaccharides are single sugars, they are the building blocks of larger carbohydrates. While carbohydrates form by dehydration reaction, they can also be broken back to monosaccharides by a hydrolysis reaction.
Also, what does “nomenclature of Hydrocarbons” mean?
- September 25, 2005 at 6:53 pm #29962mithParticipant
Naming organic molecules.. Good luck buddy, you’ll need it.
- September 25, 2005 at 6:57 pm #29964
what do you mean I’ll need it?
- September 25, 2005 at 7:05 pm #29966MrMisteryParticipant
what you are studying is very hard. But you seem to have a good grip
- September 25, 2005 at 7:10 pm #29967
really? So it’s right? 😆
I didn’t think it was that hard.. this is my firs test in college as a Bio major.. and I don’t want anything less than a high B.
mithrilhack scared me. I thought he meant that I got everything wrong and so dumb that I need all the good luck I can get. 😯
- September 25, 2005 at 7:30 pm #29968MrMisteryParticipant
I didn’t say you got it right. I can’t say that because i don’t know exactly what you should have said. I have never heard the term dehidration used for synthesis of complex ploisaccharids. But it seems to be correct. take not also that not all cells have these capabilities
- September 25, 2005 at 11:28 pm #29972mithParticipant
Let me clarify my response, nomenclature is like one of the hardest things in organic chemistry simply by the sheer amount of rules prefixes, suffixes etc..
- September 26, 2005 at 4:10 am #29978sillysunriseParticipant
Looks like you have the right idea:)
Good luck 😉
- September 27, 2005 at 12:02 pm #30009victorParticipantquote Erised:
haha…it’s my favorite..naming organic molecules..till now I only get 9 names of hydrocarbon function groups which are alkane, alkene, alkune, alcohol, ether, aldehyde, ketone, carboxylic acid and ester…
Um, for your first post..let me add a few..hope you like it.. 😀
condentation reaction is the reaction to dehydrate monosaccharide to form di-, oligo- or poly- saccharide by ‘cut’ down H atom from one monosaccharide and OH molecule fron other saccharide to form H2O. the remaining sites that had been ‘cut’ down is only O atoms, so this O atoms form a bond to each carbon group..
H-C-OH + H-C-OH —-> H-C-/OH + H-C-O/H —>[H-C]-O-[C-H] + H2O
I think that’s the reaction… 😆
hope this clear enough..and sorry if you get more confused by this.. 😆
- September 27, 2005 at 9:12 pm #30025JelanenParticipant
Yeah, your answers look good though I don’t completely understand the second question since its a fairly complex pathway to go from just a hydrocarbon (acetyl in the case of most organisms) to a monosaccharide…
- September 29, 2005 at 11:47 am #30110victorParticipant
what I think is…..maybe..acetyl will combine with other carbon source to form PGA then PGAL….after that, 2 molecules of PGAL combined to form monosaccharide..
- January 20, 2007 at 7:37 pm #67803ibnerd101Participant
omg lol yes i think you have it right! you said 1st year university bio major right? ha well , i just finished taking this! i have an exam thursday and im studying for it now (grade 11) good luck!
- September 16, 2009 at 12:19 am #92813fiorinaParticipant
wow, i’m in 9th grade and i’m learning this stuff-its hard
- January 21, 2012 at 11:06 am #109113lesegoParticipant
what bonds are found between saccharides molecules?
- January 21, 2012 at 3:15 pm #109123JackBeanParticipant
Man! Just read the first post at least 🙄
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