The function of nucleic acids is to store and express genetic information. Since fragments of DNA called genes encode the information to produce certain proteins, they are classified as nucleic acids.
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Explanation: Zinc has the lowest density. Since density = mass/volume, we can also say volume = mass/density. Given the same masses, the metal with the lowest density would have the largest volume.
15 protons (atomic number is always the number of protons) 15 electrons because no charge was mentioned so it must be the same as protons 16 neutrons because mass number is the combined number of protons and neutrons