Chapter 8: Glycolysis which is the first stage of cellular respiration is an anaerobic process. Calvin cycle happens in the stroma and is part of photosynthesis. Fermentation is an... Chapter 8: Glycolysis which is the first stage of cellular respiration is an anaerobic process. Calvin cycle happens in the stroma and is part of photosynthesis. Fermentation is another way of making energy for the cell and it is used when a cell has too much oxygen. Cellular respiration is not an anabolic pathway. Out of the three stages of cellular respiration, the electron transport chain produces the most ATP. FADH2 is an electron carrier molecule. Glycolysis makes CO2 molecules. It takes 3 turns of the Krebs Cycle to break down each glucose molecule. The breaking down of pyruvate occurs during the Krebs Cycle. Glycolysis means the splitting of glucose. Krebs cycle occurs in the mitochondria (mitochondrial matrix). Glucose is the anaerobic process that breaks down glucose. At the end of glycolysis you have 2 pyruvates. Oxygen used in cellular respiration ends up in water. ATP and NADPH turn 3-PGA into G3P. The NET gain of ATP in Glycolysis is 2 ATP. Citric acid is the name of the six-carbon molecule formed in the Krebs cycle. Rubisco is the enzyme needed to turn G3P back into a five-carbon molecule in the Calvin cycle. Stomata are the tiny pores on a leaf that let CO2 pass into plants. Calvin cycle is not directly dependent on light but will not occur at night because the Calvin cycle depends on products of light reactions. O2 is necessary in order to start the Krebs cycle and electron transport chain. G3P is rearranged into pyruvate is the pre-step for the Krebs cycle. NADH is an electron carrier molecule. CO2 is not a product of cellular respiration. ATP and water form after H+ ions return to the mitochondria through ATP synapsis best describes the electron transport chain. The Mitochondria are used in cellular respiration.
Understand the Problem
The input consists of multiple statements and facts related to cellular respiration, glycolysis, photosynthesis, and associated biochemical processes. It appears to be a summary of concepts rather than a specific question.
Answer
Some statements are incorrect: fermentation occurs when oxygen is low, glycolysis doesn’t produce CO2, and CO2 is actually a product of cellular respiration.
Some statements in the chapter are incorrect. For instance, fermentation is used when oxygen is scarce, not when there's too much. Glycolysis does not produce CO2, and CO2 is indeed a product of cellular respiration.
Answer for screen readers
Some statements in the chapter are incorrect. For instance, fermentation is used when oxygen is scarce, not when there's too much. Glycolysis does not produce CO2, and CO2 is indeed a product of cellular respiration.
More Information
Fermentation is an alternative pathway that cells use to produce energy in the absence of oxygen. Glycolysis, which leads to fermentation, does not release CO2 directly, and CO2 is a byproduct of cellular respiration from the breakdown of pyruvate and further steps.
Tips
Be careful with definitions and contexts of biochemical pathways. It's common to mistakenly associate CO2 production with the glycolysis rather than later stages of cellular respiration.
Sources
- Glycolysis | Cellular respiration | Biology (article) - Khan Academy - khanacademy.org
- Cellular respiration introduction | Biology (video) - Khan Academy - khanacademy.org
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