Sunlight free electrons from chlorophyll molecules , using electrons in making carbohydrates , animals break down plants creating protein, freeing electrons set the oxygen free to work as a strong acceptor for electrons in the mitochondria of plants and animals. Therefore carbohydrate and protein cytochrome carry only electrons, then oxidative phosphorylation takes place between nicotinamide adenine dinucleotide NAD the donor of electrons and oxygen where electrons binds phosphate with adenosine diphosphate ADP creating adenine triphosphate ATP the currency of life in all living things. It is clear that the wheel of life rotates between the Sun and the oxygen, the Sun frees the electrons from oxygen and oxygen pulls them charging the battery of life transferring ADP to ATP in all living things
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