bond formed between first phosphate group and adenosine in atp 1) phospoester bond 2) adenophosphate bond 3) nitrophosphate bond 4) phosphoanhydride bond

Dear student,
    Adenosine triphosphate (ATP) is a nucleotide that consists of an adenine and a ribose linked to three sequential phosphoryl (-PO32-) groups via a phosphoesterbond and two phosphoanhydride bonds.  Hence the answer is phosphoester. 

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