Which of the following information is not provided in most dictionaries?
part of speech
definition
quotes
pronunciation

The information that is not provided in most dictionaries is quotes.  

Parts or Figure of Speech (or stylistic device or rhetorical device) is using of different styles to complement an idea, feeling or meaning. These speeches give importance, newness of expression, or clearness.  
Definition is simply the denotative meanings explicitly given to the readers or the person being told to. In this type of meaning, the person doesn’t need to think the words too much or ponder on the meaning because they could easily understand what the other person or the author implies.  
Pronunciation is how the word is pronounced relative to its accent.  

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.