ATP - in the ATP molecule Reactions that release energy are...

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ATP (Adenosine Triphosphate) The energy in one glucose molecule is used to produce 36 ATP. ATP has approximately the right amount of energy for most cellular reactions. ATP is produced and used continuously. The entire amount of ATP in an organism is recycled once per minute. Most cells maintain only a few seconds supply of ATP. ATP is a Nucleotide Nucleotides are the building blocks of nucleic acids such as DNA and RNA. They contain a nitrogen-containing base, a 5-carbon sugar, and a phosphate group. ATP is a nucleotide that contains adenine (base), ribose (sugar), and three phosphate groups. Hydrolysis of the molecule results in the removal of a phosphate group and the release of energy. ATP is created by reactions that bond P i to ADP. This reaction consumes energy; energy is stored
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Unformatted text preview: in the ATP molecule. Reactions that release energy are called exergonic reactions and those that require an input of energy are called endergonic reactions. Endergonic reactions do not occur spontaneously; energy must be supplied to drive the reaction. ATP is continually produced and consumed as illustrated below. Formation of ATP Phosphorylation refers to the chemical reactions that make ATP by adding P i to ADP: ADP + P i + energy ↔ ATP + H 2 O Phosphorylation occurs by two different kinds of reactions discussed below. Substrate-Level Phosphorylation The formation of ATP in the cytoplasm is substrate-level phosphorylation . Energy from a high-energy substrate is used to transfer a phosphate group to ADP to form ATP....
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ATP - in the ATP molecule Reactions that release energy are...

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