Macromolecules are large organic molecules found in living things. Which of the following are considered macromolecules? Check all that apply.
a. Water
b. Carbohydrates
c. Proteins
d. Nucleic Acids

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.