1. What are the redox, oxidation, and reduction reactions?
2. What are the 3 steps of respiration?
3. What is a fermentation?
1. The cell devises the energy stored in food molecules through redox reaction, in which one substance partially or totally shifts electrons to another. The substance receiving electrons is reduced, the substance losing electrons is oxidized. During cellular respiration, glucose is oxidized, and oxygen is reduced to water.
2. The three steps are : Glycolysis, The Citric Acid Cycle, and Oxidative Phosphorylation.
3. All cells are able to synthesize ATP via the process of glycolysis. In many cells, if oxygen is not present, pyruvate is metabolized in a process called fermentation. Fermentation complements glycolysis and makes it possible for ATP to be continually produced in the absence of oxygen. By oxidizing the NADH produced in glycolysis, fermentation regenerates NAD+, which can take part in glycolysis once again to produce more ATP. |
5 main facts about this chapter.
. With cellular respiration, the energy is released from the chemical bonds into the complex organic molecules.
. Glycolysis splits glucose and produce NADH and ATP, location is cytoplasm.
. Krebs cycle oxidizes pyruvic acid to CO2, produces NADH and FADH2, location is mitochondria matrix.
. Electron Transport Chain converts NADH and FADH2 into ATP, location is mitochondria cristae.
. Electron carrier compounds are the molecules that transport or shuttle electrons within the cell.
Video about cellular respiration :
In this chapter, we learn about cellular respiration, its function, its requirements, and products. We learnt about the redox reaction, the three steps of the respiration, and the fermentation. Glycolysis and the citric acid cycle supply electrons to the electron transport chain, which drives oxidative phosphorylation. Oxidative phosphorylation generates ATP.
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