CSP DNA Synthesis - DOE Joint Genome Institute
The leading strand is made continuously in a 5' to 3' direction by DNA polymerase III as the DNA helicase unwinds the parental DNA helix. However, because the parental DNA strands are antiparallel, the lagging strand must be made in short fragments. RNA polymerase (primase) synthesizes a short RNA primer which is extended by DNA polymerase III. DNA polymerase II then digests the RNA primer and replaces it with DNA. Finally, DNA ligase joins the fragments of the lagging strand together.
Control of DNA Synthesis in Bacteria (PDF Download …
In the end, each parent strand serves as a template to synthesize a complementary copy of itself, resulting in the formation of two identical DNA molecules
Bacterial cells include the following:basal body - A structure that anchors the base of the flagellum and allows it to rotate.
capsule - A layer on the outside of the cell wall.
Recombinant DNA Technology in the Synthesis ..
: The cells of bacteria are different from those of plants and animals in many ways, the most obvious of which is that bacteria lack a nucleus and other membrane-bound organelles (except ribosomes).
Protein synthesis :: DNA from the Beginning
Some bacteria have more than one flagellum.
pili - (singular is pilus) Hair-like projections that allow bacterial cells to stick to surfaces and transfer DNA to one another.
plasma membrane - A permeable membrane located within the cell wall.
On the Regulation of DNA Replication in Bacteria
Remember, as mentioned above, each DNA strand has two ends. The 5' end of the DNA is the one with the terminal phosphate group on the 5' carbon of the deoxyribose; the 3' end is the one with a terminal hydroxyl (OH) group on the deoxyribose of the 3' carbon of the deoxyribose (see Fig. 8). The two strands are antiparallel, that is they run in opposite directions. Therefore, one parent strand - the one running 3' to 5' and called the - can be copied directly down its entire length (see Fig. 9). However, the other parent strand - the one running 5' to 3' and called the - must be copied discontinuously in short fragments (Okazaki fragments) of around 100-1000 nucleotides each as the DNA unwinds. This occurs, as mentioned above, at the replisome. The lagging DNA strand loops out from the leading strand and this enables the replisome to move along both strands pulling the DNA through as replication occurs. It is the actual DNA, not the DNA polymerase that moves during bacterial DNA replication (see Fig. 5).
What is the role of DNA in protein synthesis? - Quora
Hair grows from your head, nonstop, day in and day out. The cells of your hair follicles somehow generate all of the protein that make up this hair. How is this protein created? The answers to these questions are DNA replication and protein synthesis. The activity in this section places you within the cell, involving you with the processes of DNA replication and protein synthesis.
DNA is present from Bacteria to Human Beings
A variety of engaging animations, lecture clips, virtual labs, and other classroom resources teach key concepts related to DNA’s structure and function.