If you install a new bulb and the flashlight works again, what should you do next

If the flashlight is working, Then nothing. You might want to place the batteries if it is dull or flickering. Odd question

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.