PO3+ is the formula of an ion known as Phosphoryl ion. Here Phosphorus is in +5 oxidation state.

ATP stands for Adenosine TriPhosphate, its chemical name is:

dihydroxy-oxolan

methoxy-hydroxy-phosphoryl

oxy-hydroxy-phosphory

oxyphosphonic acid

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Benzylidenecyclopentanone

Draw its structure by attaching C6H5-CH= to

carbon 2 of cyclopentanone.

ATP in Krebs cycle is made by substrate level phosphorylation, where the phosphoryl group is directly transferred to ADP. This occurs when succinyl CoA is converted into succinate. Actually, this is the only time during the cycle that ATP is made.

A nuclease is an enzyme capable of cleaving the phosphodiester bonds between the nucleotide subunits of nucleic acids