Which sentence contains the correct homophone? rase an objection if you have a problem. raze an objection if you have a problem. raise an objection if you have a problem. rays an objection if you have a problem.

Please raise an objection if you have a problem. "Raise" is the correct spelling in that context. 

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.