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LS23L Final Exam 2025 Questions and Answers What is epidemiology? - --Answer --The study of diseases and populations at risk What is an epidemic? - --Answer --refers to a disease that shows higher incidence than expected What is pandemic? - --Answer --occurs when the disease has spread across very large regions, even continents What factors can contribute to the spread of a disease? - --Answer -- individual's health, natural environment of a region, the genetic background of a population, infrastructure present in a nation, and cultural and social practices. How does HIV infect cells? - --Answer --it infects human T-cells by binding to a protein called CCR5, which enables it to enter the cell and begin propagating and then cause immune cell death via several mechanisms. What is gel electrophoresis? - --Answer --enables us to separate DNA fragments based on size and then are viewed under ultraviolet light ....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1