Which type of biological macromolecule is a new drug most likely to be?
a. nucleic acid
b. protein
c. carbohydrate
d. lipid

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons