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Glycolysis

Definition

noun

(1) The initial metabolic pathway of cellular respiration in which a series of reactions happening in the cytosol results in the conversion of a monosaccharide, often glucose, into pyruvic acid, and the concomitant production of a relatively small amount of high-energy molecules, such as ATP.

(2) The cellular degradation of the simple sugar, glucose, to yield ATP as an energy source.


Supplement

The most common and well-known type of glycolysis is the Embden-meyerhof pathway, initially explained by Gustav Embden and Otto Meyerhof.

The term can be taken to include alternative pathways, such as the Entner-Doudoroff Pathway.


Word origin: Greek, glykys = sweet, referring to sugar + Iyein = to loosen.

Related forms: glycolytic (adjective).

Synonym: Embden-meyerhof pathway.
See also: Krebs Cycle, cellular respiration.


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sugar consumption and weight gain

... why we want to go for artificial sweeteners for dieting? Sugar converted into glucose and fructose by digestive system and they enter into the glycolysis same as in the case of other carbohydrates(eg. starch). Why diabetes people avoiding table sugar? Eating table sugar is same as eating starchy ...

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by josem
Thu Sep 04, 2014 9:14 pm
 
Forum: Physiology
Topic: sugar consumption and weight gain
Replies: 1
Views: 610

Re: Increase in free energy in glycolysis

Increase in free energy just refers to Gibbs free energy. That free energy comes from enthalpy (internal energy) - entropy (chaos). Also expressed as Gibbs Free Energy = Enthalpy - Entropy. The idea is that with each subsequent step of glycoysis there is more chaos and thus the entropy goes up and t...

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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: 2437

Re:

... they are not interested in partiall pathways (like if half of the pyruvate was degraded before it was stopped due to lack of NAD+ and FAD:) Glycolysis will definitelly take part. Probably also the pyruvate decarboxylation. However, the TCA cycle is questionable, because with 100 molecules ...

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by caters
Mon Feb 03, 2014 4:37 am
 
Forum: Cell Biology
Topic: ATP produced by human cells in an anaerobic chamber. LOST!
Replies: 2
Views: 4307

Increase in free energy in glycolysis

I'm reading about glycolysis in a general biology textbook. It says that in the first 5 steps the free energy increases with each step. Two of those steps are powered by ATP, but the rest are not. In those other steps, how does the ...

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by cadamcross
Sat Feb 01, 2014 2:25 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
Replies: 3
Views: 2437

Re:

it does not relate to the timing but to the question whether they can run at the same time with glycolysis JackBean I've just had a check at another textbook and you were right! Unlike what I first thought, glycolysis can't take place once glycogenolysis has started because ...

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by Aymeric
Sat Dec 14, 2013 11:51 pm
 
Forum: Human Biology
Topic: When does gluconeogenesis kick in during physical activity?
Replies: 12
Views: 6258
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