[Solved] While the Supreme Court declared unconstitutional a 1996 law aimed at broadly regulating obscenity and pornography on the Internet, it upheld a later law that requires public libraries to use filtering software on computers with online access. Citric Acid Cycle: A series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate derived from carbohydrates, fats, and proteins into carbon dioxide. Electron Transport Chain: A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions and couples this electron transfer with the transfer of protons (H+ ions) across a membrane. Acetyl Group: A functional group consisting of a carbon atom double-bonded to an oxygen atom and single-bonded to a methyl group, denoted as CH3CO. Mitochondrial Matrix: The innermost compartment of the mitochondria, filled with enzymes and molecules vital for cellular respiration and energy production.