Cellular Respiration: Glycolysis

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Information about Cellular Respiration: Glycolysis

Published on September 27, 2008

Author: stokercg2913

Source: slideshare.net

Cellular Respiration – Glycolysis Coy Stoker Axia College Cellular Respiration - Glycolysis

Cellular Respiration – Glycolysis Stages of Glycolysis: Step 1: ATP “Spent” Step 2: Split Step 3: NAD + / Phosphate Step 4: ATP Produced Cellular Respiration - Glycolysis

Glycolysis is only one segment of cellular respiration (Pruitt, Underwood, 2005). Glycolysis is the most primitive of the types of cellular respiration. Glycolysis does not required oxygen so it is called anaerobic. There are four major steps in glycolysis. The process begins with a molecule of glucose. The glucose molecule is exposed to 2 ATP molecules which results in the glucose molecule picking up two phosphates. The result of this reaction is fructose diphosphate and two ADP molecules. Then fructose diphosphate is split into 2 glyceraldehyde phosphate (Respiration, n.d.). Then a free floating phosphate is added to each molecule of glyceraldehyde phosphate and NAD+ picks up a particle of hydrogen from each molecule of glyceraldehyde phosphate. The result of both of these reactions are 2 3-diphosphoglycerate . Finally both molecules of 3-diphosphoglycerate are exposed to 2 ADP a piece which result in 4 ATP. The net result of glycolysis is 2 ATP and 2 NADH. Cellular Respiration - Glycolysis

Glycolysis is only one segment of cellular respiration (Pruitt, Underwood, 2005). Glycolysis is the most primitive of the types of cellular respiration. Glycolysis does not required oxygen so it is called anaerobic. There are four major steps in glycolysis. The process begins with a molecule of glucose. The glucose molecule is exposed to 2 ATP molecules which results in the glucose molecule picking up two phosphates. The result of this reaction is fructose diphosphate and two ADP molecules. Then fructose diphosphate is split into 2 glyceraldehyde phosphate (Respiration, n.d.). Then a free floating phosphate is added to each molecule of glyceraldehyde phosphate and NAD+ picks up a particle of hydrogen from each molecule of glyceraldehyde phosphate. The result of both of these reactions are 2 3-diphosphoglycerate . Finally both molecules of 3-diphosphoglycerate are exposed to 2 ADP a piece which result in 4 ATP. The net result of glycolysis is 2 ATP and 2 NADH.

ATP “Spent” Cellular Respiration - Glycolysis ATP ATP ADP ADP One phosphate from ATP added leaving ADP One phosphate from ATP added leaving ADP Fructose Diphosphate Before After 2 ATP Spent Next Glucose Phosphate 6 Carbon Glucose Fructose Diphosphate Split

During the first step in glycolysis there is actually a loss of two ATP. A phosphate is taken from both ATP in order to make the resulting fructose diphosphate more reactive. This step also releases two ADP into the cellular plasma which will be used later. Cellular Respiration - Glycolysis

During the first step in glycolysis there is actually a loss of two ATP. A phosphate is taken from both ATP in order to make the resulting fructose diphosphate more reactive. This step also releases two ADP into the cellular plasma which will be used later.

Cellular Respiration - Glycolysis Split Split Glyceraldehyde Phosphate Glyceraldehyde Phosphate Before After Next Split Fructose Diphosphate Glyceraldehyde Phosphate NAD + /Phosphate

The second step is simply splitting fructose diphosphate which makes 2 glyceraldehyde phosphate . By doing this glycolysis is able to double the amount of ATP produced. Cellular Respiration - Glycolysis

The second step is simply splitting fructose diphosphate which makes 2 glyceraldehyde phosphate . By doing this glycolysis is able to double the amount of ATP produced.

Cellular Respiration - Glycolysis NAD + / Phosphate Glyceraldehyde Phosphate Glyceraldehyde Phosphate NAD + NADH NAD + NADH Phosphate Phosphate 3-Diphosphoglycerate 3-Diphosphoglycerate Before After Next -H/+Ph Glyceraldehyde Phosphate 3-Diphosphoglycerate 4 ATPs Produced

The third step entails harvesting a hydrogen molecule from each glyceraldehyde phosphate and adding it to NAD + making NADH, which is used later on in cellular respiration. Also a free floating phosphate is added to glyceraldehyde phosphate to make 2 3-diphosphoglycerate . Cellular Respiration - Glycolysis

The third step entails harvesting a hydrogen molecule from each glyceraldehyde phosphate and adding it to NAD + making NADH, which is used later on in cellular respiration. Also a free floating phosphate is added to glyceraldehyde phosphate to make 2 3-diphosphoglycerate .

Cellular Respiration - Glycolysis ATP Produced 3-Diphosphoglycerate 3-Diphosphoglycerate ADP ATP ATP ADP Glyceraldehyde Phosphate Glyceraldehyde Phosphate ADP ATP ATP ADP Pyruvate Pyruvate ADPs steal four phosphates making four ATPs Before After 3-Diphosphoglycerate Pyruvate

The third step entails harvesting a hydrogen molecule from each glyceraldehyde phosphate and adding it to NAD + making NADH, which is used later on in cellular respiration. Also a free floating phosphate is added to glyceraldehyde phosphate to make 2 3-diphosphoglycerate . Cellular Respiration - Glycolysis

The third step entails harvesting a hydrogen molecule from each glyceraldehyde phosphate and adding it to NAD + making NADH, which is used later on in cellular respiration. Also a free floating phosphate is added to glyceraldehyde phosphate to make 2 3-diphosphoglycerate .

References Respiration. (n.d.) Retrieved January 16, 2007, from BioInquiries Website: http://higheredbcs.wiley.com/legacy/college/pruitt/0471473219/bioinquiries/ch10/bioinquiry_section_10_3.html Pruitt, P.L., Underwood, L.S. (2005). BioInquiry: Making Connections in Biology. Danvers, MA: Wiley. Cellular Respiration - Glycolysis

Respiration. (n.d.) Retrieved January 16, 2007, from BioInquiries Website:

http://higheredbcs.wiley.com/legacy/college/pruitt/0471473219/bioinquiries/ch10/bioinquiry_section_10_3.html

Pruitt, P.L., Underwood, L.S. (2005). BioInquiry: Making Connections in Biology. Danvers, MA: Wiley.

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