Daddy-Long-Legs tells the story of orphan Jerusha Abbott, who was sent to college by an trustee of the orphanage. Jerusha's only commitment to her donor is to write him letters, updating him on her in school. Please fill in the blanks; from the book Daddy-Long-Legs

Okay, biology isn't exactly my strongest subject (it never has been), but i'm pretty sure the answer is nucleotides. dna is made up of nucleotides. each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. there are four different nitrogen bases: adenine (a), thymine (t), guanine (g), and cytosine (c). a always pairs with t, and g always pairs with c.