The need for DNA replication - Replication. - BBC Bitesize.
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On one end, the DNA is being synthesized in a continuos strand (5' to 3'), on the other end the DNA is begin synthesized by Okazaki fragments (in chunks). Primase An enzyme that joins RNA nucleotides to make the primer using the parental DNA strand as a template.
DNA replication is accomplished by DNA polymerase. This process is assisted by RNA polymerase, helicase, DNA ligase and topoisomerase. DNA replication proceeds in one direction only, necessitating the formation of Okazaki fragments during the replication of the lagging strand. The leading strand is synthesized continuously. Protein synthesis.
Watch DNA replication video lessons and learn about enzymes, important steps, replication bubbles, and more. These lessons are just a portion of our AP Biology course.
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Cracking the AP Biology Exam 6 Molecular Genetics DNA REPLICATION. Because the DNA molecule is twisted over on itself, the first step in replication is to unwind the double helix by breaking the hydrogen bonds. This is accomplished by an enzyme called helicase. The exposed DNA strands now form a y-shaped replication fork.
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