What are the events of DNA replication?
What are the events of DNA replication?
Step 1: Replication Fork Formation. Before DNA can be replicated, the double stranded molecule must be “unzipped” into two single strands. Step 2: Primer Binding. The leading strand is the simplest to replicate. Step 3: Elongation. Step 4: Termination.
What is the lagging strand in DNA replication?
The lagging strand is the strand of nascent DNA whose direction of synthesis is opposite to the direction of the growing replication fork. Because of its orientation, replication of the lagging strand is more complicated as compared to that of the leading strand.
What is the difference between the leading strand and the lagging strand in DNA replication quizlet?
What is the difference between the leading strand and the lagging strand in DNA replication? The leading strand is synthesized continuously in the 5′ → 3′ direction, while the lagging strand is synthesized discontinuously in the 5′ → 3′ direction.
What is the result of DNA ligase’s action?
What is the result of DNA ligase’s action? DNA is broken up at specific sites. DNA translation occurs. A daughter strand of DNA produced during chromosome replication can be composed of leading and lagging strands from different replication bubbles.
What is the result of DNA ligase’s action quizlet?
What is the result of DNA ligase’s action? DNA fragments are joined together. In circular DNA, the DNA molecule is not shortened during replication. One application of GMOs is to engineer mice that have particular diseases that scientists wish to study.
What is the function of DNA polymerase III in DNA synthesis?
The main function of the third polymerase, Pol III, is duplication of the chromosomal DNA, while other DNA polymerases are involved mostly in DNA repair and translesion DNA synthesis. Together with a DNA helicase and a primase, Pol III HE participates in the replicative apparatus that acts at the replication fork.
Why do histones bind tightly to DNA quizlet?
What enzyme catalyzes the elongation of a DNA strand in the 5′ to 3′ direction? Why do histones bind tightly to DNA? Histones are positively charged and DNA is negatively charged. What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
Why do histones bind tightly to DNA?
DNA is negatively charged, due to the phosphate groups in its phosphate-sugar backbone, so histones bind with DNA very tightly. Figure 1: Chromosomes are composed of DNA tightly-wound around histones. Chromosomal DNA is packaged inside microscopic nuclei with the help of histones.
What is the most important reason a cell would have translational control over the regulation of gene expression?
What is the MOST important reason a cell would have translational control over the regulation of gene expression? At the translational level, protein synthesis can be turned on and off quickly to respond to the needs of the cell.