Dictionary » I » Isomer



1. (Science: chemistry) One of two or more molecules that have the same chemical formula but have a different stereochemical arrangement of their atoms.

2. (Science: radiobiology) nuclides having the same number of neutrons and protons but capable of existing, for a measurable time, in different quantum states with different energies and radioactive properties. Commonly, the isomer of higher energy decays to one of lower energy by the process of isomeric transition.

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Please help!

1) Oxaloacetate is a compound (C4O5) in the tricarboxylic acid cycle, it is an isomer of Malate, after the action of Malate Dehydrogenase or Pyruvate Carboxylase, and is a compund which has been formed (sometimes oxaloacetate, sometimes acetyl, depending on the ...

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by billyfisher100
Sat Jan 21, 2012 1:13 pm
Forum: Cell Biology
Topic: Please help!
Replies: 10
Views: 7363

Membrane transport

hmm a) yes its because of the different spatial arrangement. its basically because there must be a channel protien most probably and the other isomer cant activate because of its different arrangement. its like if u have a palm sensor or sth that basically checks the hand layout of lets say the ...

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by jwalin
Sun Dec 05, 2010 12:56 am
Forum: Cell Biology
Topic: Membrane transport
Replies: 2
Views: 4029

Bio questions, help please

... positions. Describe what happends when the third atom is attached? 3. If you were to costruct a carbon ring with five carbon atoms, would it be an isomer of the 5c chain? explain expalin explain. 4. construct the glyceral molecule- is this a simple carbohydrate? explain explain 5. does glycine ...

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by Rinatachka
Tue Jul 27, 2010 3:58 pm
Forum: General Discussion
Topic: Bio questions, help please
Replies: 3
Views: 5976

Fructose Facts

Try a search on Monosaccharides. Fructose is an isomer of glucose

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by MichaelXY
Mon Sep 29, 2008 9:31 pm
Forum: General Discussion
Topic: Fructose Facts
Replies: 1
Views: 1316

Sugar isomers

The human body utilizes glucose and other sugars in the D-isomer form. Is the L isomer form sweet tasting and could the L form be used as a food sweetner or is it dangerous for human consumption?

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by genovese
Mon Feb 18, 2008 2:30 pm
Forum: Molecular Biology
Topic: Sugar isomers
Replies: 10
Views: 8301
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