3/17/2021 0 Comments Dna Replication Steps
This process is semi-conservative, meaning that each new copy ends up with one of the original strands of DNA.Essentially the DNA unzips and each of the original strands acts as a template for the new strands.It synthesizes new DNA strands in a 53 direction, but also has 35 exonuclease proof reading capabilities that removes improper base pairs.In Prokaryotes DNA Pol I mainly handles proofreading replacement of RNA primer, while DNA Pol III synthesizes most of the DNA.
Bacterial topoisomerase is the target of the antibiotic Fluoroquinolone (Cipro). An auto-antibody targeted at topoisomerase is common in Scleroderma. The RNA is very similar to DNA, except that it has Uracil (U) in place of Thymine (T) and it is single stranded. RNA is synthesized in a 5 3 direction as the RNA Polymerase moves along the DNA in a 3 5 Direction. In Eukaryotes RNA Pol I makes Ribosomal RNA (rRNA), II makes Messenger RNA (mRNA) III makes tRNA. A 5 Cap of a modified guanine is added to the end of the RNA to help the ribosome recognize the RNA. It is a AAUAAA sequence that is added without following a complementary DNA sequence and helps prevent degradation of the RNA. This splicing can be carried out multiple different ways creating different proteins from a single gene. Each amino acid is coded for by a 3 nucleotide sequence called a codon. The tRNA, which carries the amino acid, has a complimentary anti-codon which recognizes the codon. Translation begins at the start codon (AUG) and ends at a stop codon. They get me to recall the most important concepts before I review that section in First Aid. These videos and study aids may be appropriate for students in other settings, but we cannot guarantee this material is High Yield for any setting other than the United States Medical Licensing Exam. This material should NOT be used for direct medical management and is NOT a substitute for care by a medical professional. IF YOU ARE A PATIENT PLEASE DIRECT YOUR QUESTIONS TO YOUR DOCTOR or visit a website that is designed for patient education. Well assume youre ok with this, but you can opt-out if you wish.
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