Base pairing in DNA occurs through
A) covalent bonds between complementary bases on nucleic acid chains.
B) hydrogen bonds between complementary bases on nucleic acid chains.
C) salt bonds between complementary bases on nucleic acid chains.
D) an interaction that is not well understood.
Question 2
The substance in paints that hardens to form a continuous surface coating is called a
A) pigment.
B) binder.
C) solvent.
D) thinner.