If you have a subject without an s, the verb has an s. If you have a plural subject, the verb doesn't have an s. Examples: (Give at least 3 examples, one to show a singular subject with an -s verb, one to show a plural subject with a No-S verb, and one with a “to be” verb) Linking verb 1. jump 2. jumps 3. is, am, are, been, seems​

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.