[Solved] Why does it appear that each origin can only be activated once per cell cycle? A)Mcm proteins are displaced from the DNA after replication and cannot reassociate with a replication origin that has already fired. B)The ORC is denatured after replication and cannot return to the DNA. C)The DNA becomes naked until the next round of cell division. D)Mcm proteins reassociate with DNA immediately and prevent further replication from that DNA. E)Mcm proteins bind to other proteins in the cytoplasm; together they actively inhibit further replication. Dopamine Infusion: The administration of dopamine via an intravenous line to treat certain conditions, such as low blood pressure or heart failure. DE-style Equations: Differential Equation-style equations; mathematical equations that relate functions with their derivatives, often used in modeling. Infusion Rates: The speed at which a drug or substance is administered intravenously, typically measured in ml/hr (milliliters per hour). Meperidine: A synthetic opioid analgesic drug, used to treat moderate to severe pain.