I) steroid hormones are lipid soluble and easily cross the phospholipid bilayer. ii) steroid hormones usually exert their effects on target cells through membrane receptor proteins. iii) steroid hormones act on cells close to where they were produced. iv) steroid hormones regulate gene transcription by binding to intracellular receptor proteins.

I) Steroid hormones are lipid soluble and easily cross the phospholipid bilayer

IV) Steroid hormones regulate gene transcription by binding to intracellular receptor proteins.

Explanation:

the answer to your question is:

c. complementary base-pairing

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high