Where Does Glycolysis Occur Sin

Where Does Glycolysis Occur Sin

Ever wondered what glycolysis is or where glycolysis occurs sin?

Glycolysis is a process that helps break down blood sugar (C6H12O6) to pyruvic acid during digestion for easy adsorption. The multi-step metabolic pathway takes place in 10 steps, assisted by adequate enzymes for faster progression. The resultant pyruvate form easier compounds of carbohydrates, amino acids, alanine (amino acid), or ethanol via various processes and different catalysis. 

Where Does Glycolysis Occur Sin?

Glycolysis is a cytoplasmic process that occurs in 2 stages in any cell. First, in the cytosol of cells, this breakdown releases high-energy Adenosine triphosphate molecules (ATPs). Later, the initial breakdown of the 6 Carbon molecule results in 2 pyruvate products that undergo a citric acid cycle after reaching the mitochondria of the cell. This cycle takes one 1 ATP per molecule of pyruvate.

 Where Does Glycolysis Almost Always Occur?

It is in the cytoplasm of the cell where necessary enzymes and factors are present that facilitate the process of glycolysis. Glycolysis has been noted to occur in primarily primitive cells and the now existent simple cells like prokaryotic cells. This process is the first step in breaking down glucose to extract energy for cellular metabolism. Hence, it remains essential in both prokaryotic eukaryotic cells. 


For glucose to reach the cytoplasm of cells, the molecules pass through a concentration gradient through diffusion. Another process that usually consumes energy is the use of glucose transporter molecules. The GLUT proteins help in facilitator diffusion through the membrane of the cells. To break down the 6 Carbon molecule into two resultant 3 Carbon pyruvates, the first phase includes trapping the glucose molecules to use ATP and simplify the molecules. The resultant release of energy as ATPs and Nicotinamide adenine dinucleotide (NAHDS) form NADs.

Can glycolysis occur without oxygen?

Glycolysis is a linear metabolic pathway and is the first of the main cellular processes for energy formation by cellular respiration that results in the production of energy through ATP. Glycolysis favorably occurs in the presence of oxygen but can occur in the limited supply of oxygen through anaerobic respiration, resulting in the formation of lactate. 

After the formation o pyruvic acid, if oxygen is available to the cells, an aerobic cellular process- citric acid cycle- also called the Krebs cycle occurs for helping release stored energy through oxidation. In the absence of oxygen, anaerobic fermentation occurs in cells resulting in the formation of ethanol and lactic acid. The anaerobic process to obtain lactate is effective only for a short while during intense muscle activity, ranging from 10 seconds to 2 minutes.

 Where Does Glycolysis Occur In Anaerobic Respiration?

The reduction of pyruvic acid to lactate in the limited availability or absence of oxygen occurs in the muscles. Instead of undergoing the TCA or Krebs cycle in the cell’s mitochondria, the cytosolic enzyme lactate dehydrogenase converts pyruvate to lactate in the cytoplasm.

The lactic acid formation is responsible for cramps caused during sports or other such energy exerting activities that lower the amount of oxygen supplied to the cells for a short while. The pain caused can be eased by using warm water packs, which help dissolve the lactic acid molecules that tend to slow you down.

 Hope this article answered all your question about where does glycolysis occur sin. 

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