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Activation energy

Activation energy

(Science: chemistry) The amount of energy (expressed in joules) that is needed to convert all the molecules in one mole of a reacting substance from a ground state to the transition state. The energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; catalysts are said to reduce the energy Of Activation during the transition phase of a reaction.Activation energy is the energy required to initiate a reaction, such at the 2 atp required to breakdown glucose into pyruvic acid in respiration. In this case, the process results in a net gain of energy.


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Re: Increase in free energy in glycolysis

Increase in free energy just refers to Gibbs free energy. That free energy comes from enthalpy (internal ... glucose-6-phosphate and PFK1 making Fructose-1,6-Bisphosphate is made to overcome the activation energy of the subsequent step. I don't know what you understanding of biochemistry ...

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by daniel.kurz
Wed Feb 05, 2014 3:03 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
Replies: 3
Views: 2202

Re: Enzymes and activation energy.

QUESTION: Explain how enzymes lower activation energy

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by misunderstandingbio
Sun Sep 15, 2013 3:37 pm
 
Forum: Molecular Biology
Topic: Enzymes and activation energy.
Replies: 5
Views: 39774

Cellular Respiration

1) the problem is the energy, which you need/get from respective steps. Also, as you may know, you need first to iniciate the breakdown by activation of glucose by phosphorylation. So, which step of Glc degradation would you like to connect ...

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by JackBean
Fri Dec 31, 2010 10:53 am
 
Forum: Cell Biology
Topic: Cellular Respiration
Replies: 2
Views: 2162

Questions to elementary biochemistry

... and clear. 1. Enzymes doesn't influence equibrilium, but they lower the activation energy. I wonder how this is possible? Isn't the activation energy expressed in free Gibbs ...

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by strikken
Mon Dec 27, 2010 12:39 pm
 
Forum: General Discussion
Topic: Questions to elementary biochemistry
Replies: 4
Views: 4048

Alleles

... cell lineage, but why keep it in the somatic cells of the organism? The energy expenditure of having to duplicate it every replication seems we should ... rid of it. But I am going to guess that the Xi still has some gene activation that is important to the organism. Still, transpose those genes ...

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by kolean
Mon Nov 30, 2009 2:28 pm
 
Forum: Cell Biology
Topic: Alleles
Replies: 6
Views: 3988
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