BIOL 300 Lecture Notes - Lecture 5: Adenosine Triphosphate, Oxidative Phosphorylation, Passive Transport

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22 May 2020
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Passive transport is a naturally occurring phenomenon and does not require the cell to exert any of its energy to accomplish the movement. Substances move from an area of higher concentration to an area of lower concentration. A physical space in which there is a range of concentrations of a single substance has a concentration gradient. Active transport mechanisms require the use of the cell"s energy, usually in the form of atp. Bulk transport is used to engulf or expel substances endocytosis (swallowing top pic) and exocytosis (expelling bottom pic). Describe the structure of atp and explain its function of energy coupling in cells. Adenosine triphosphate (atp) is a molecule used to temporarily store and transfer energy in cells. Energy is released from atp by removing phosphate groups to form adp and amp (di- and mono-). Adp by adding phosphate groups to produce atp (generally referred to as phosphorylation).

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