Which of the following sentences contains an idiom? Every time I hear him tell that story, my blood starts to boil.

Tonya is shy, but she is really coming out of her shell and getting involved in more group activities.

Kara told Maria not to spill the beans about Roberto's surprise party.

All of the choices are correct.

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.

Iguess the answer is d