How is the bond formed in the structure of a dinucleotide?

  • A
    Between the $-NH_2$ group of one nucleotide and the $-COOH$ group of another nucleotide.
  • B
    Between the $3'-OH$ group of one nucleotide and the $5'$-phosphate group of another nucleotide.
  • C
    Between the $1'-OH$ group of one nucleotide and the $4'-OH$ group of another nucleotide.
  • D
    Between the $-CONH_2$ group of one nucleotide and the $-OH$ group of another nucleotide.

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