![]() DNA Replication: The ProcessĭNA replication begins when an enzyme called helicase unwinds, and unzips the DNA molecule. ![]() There are four main enzymes that facilitate DNA replication: helicase, primase, DNA polymerase, and ligase. For each event, there is a specific enzyme which facilitates the process. When the replication process is complete, there are two identical sets of DNA, each containing one of the original strands of DNA, and one newly synthesized strand.ĭNA replication involves a certain sequence of events. What this means is when a strand of DNA is replicated, each of the two original strands acts as a template for a new complementary strand. DNA must be copied so that each new daughter cell will have a complete set of chromosomes after cell division occurs.ĭNA replication is referred to as “semi-conservative”. It occurs during the synthesis (S) phase of the eukaryotic cell cycle. Knowledge of DNA’s structure helped scientists understand DNA replication, the process by which DNA is copied. How did you get from one set of DNA, to 37 million sets, one for each cell? Through DNA replication. You started as one single cell and are now made up of approximately 37 trillion cells! Each and every one of these cells contains the exact same copy of DNA, which originated from the first cell that was you. Chapter 1 - Nature and Processes of Scienceġ.1 Case Study: Why Should You Learn About Science?ġ.7 Pseudoscience and Other Misuses of Scienceġ.8 Case Study Conclusion: To Give a Shot or NotĢ.1 Case Study: Why Should You Study Human Biology?Ģ.6 Case Study Conclusion: Our Invisible InhabitantsĤ.14 Case Study Conclusion: More Than Just Tiredĥ.10 Mendel's Experiments and Laws of Inheritanceĥ.12 Sexual Reproduction, Meiosis, and Gametogenesisĥ.18 Case Study Conclusion: Cancer in the FamilyĦ.1 Case Study: Our Similarities and DifferencesĦ.4 Human Responses to Environmental StressĦ.9 Case Study Conclusion: Your Genes May Help You Save a Lifeħ.9 Case Study Conclusion: Under PressureĨ.1 Case Study: The Control Centre of Your Bodyġ0.1 Case Study: Skin, Hair, and Nails - Decorative but Functionalġ0.2 Introduction to the Integumentary Systemġ0.8 Case Study Conclusion: Wearing His Heart on His Sleeveġ1.8 Case Study Conclusion: A Pain in the Footġ2.7 Case Study Conclusion: Needing to Relaxġ3.1 Case Study: Respiratory System and Gas Exchangeġ3.2 Structure and Function of the Respiratory Systemġ3.7 Case Study Conclusion: Cough That Won't Quitġ4.1 Case Study: Your Body's Transportation Systemġ4.2 Introduction to the Cardiovascular Systemġ5.2 Introduction to the Digestive Systemġ5.7 Disorders of the Gastrointestinal Tractġ5.8 Case Study Conclusion: Please Don’t Pass the Breadġ6.5 Ureters, Urinary Bladder, and Urethraġ6.7 Case Study Conclusion: Drink and Flushġ7.7 Case Study Conclusion: Defending Your Defensesġ8.2 Introduction to the Reproductive Systemġ8.3 Structures of the Male Reproductive Systemġ8.4 Functions of the Male Reproductive Systemġ8.5 Disorders of the Male Reproductive Systemġ8.6 Structures of the Female Reproductive Systemġ8.7 Functions of the Female Reproductive Systemġ8.9 Disorders of the Female Reproductive Systemġ8.12 Case Study Conclusion: Trying to ConceiveĬhapter 1 Answers: Nature and Processes of ScienceĬhapter 2 Answers: Biology: The Study of LifeĬhapter 7 Answers: Introduction to the Human BodyĬhapter 14 Answers: Cardiovascular Systemįigure 5.4.1 DNA replication takes place before a cell starts the process of cell division.īy Christine Miller DNA Replication: OverviewĭNA replication is required for the growth or replication of an organism. ![]()
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