![]() Okazaki fragments are necessary for the replication of both strands simultaneously. What are Okazaki fragments and why are they necessary? Polymerase I then removes RNA primers and fills the gaps between Okazaki fragments. Polymerase I In prokaryotic cells, polymerase III is the major replicative polymerase, functioning in the synthesis both of the leading strand of DNA and of Okazaki fragments by the extension of RNA primers. Which DNA polymerase removes Okazaki fragments? Okazaki fragments are short sequences synthesized in the lagging strand because DNA polymerase can synthesize only from 5′ to 3′, and the DNA strands are antiparallel. Which of the following statements best describes Okazaki fragments? They are formed in the lagging strand. Which best describes Okazaki fragments in DNA replication? On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule. On the leading strand, DNA synthesis occurs continuously. How does the Okazaki fragments occur for DNA replication? They are important because they allow for both daughter strands to be synthesized, which are necessary for cell division. These small sections are called Okazaki fragments.Okazaki fragments are small sections of DNA that are formed during discontinuous synthesis of the lagging strand during DNA replication. To get around the problem cells wait untill the replication fork has unwound a bit of DNA before DNA Pol III starts replicating the lagging strand moving away from the replication fork. For the lagging strand the replication fork is moving 3' to 5' which is bad because you cant make DNA in that direction. For one strand this will be 5' to 3' and so DNA Pol III cab just fillow the replication fork happily. During replication the replication fork only moves in one direction. This means that at both ends of the molecule one stand will have a 5' phosphate while the other has a 3' OH. If you look at a full DNA molecule you'll find that the 2 stra ds are antiparallel. You can therefore atate that the DNA was synthesized in a 5' to 3' direction. What you end up with is a single strand of DNA with a 5' phosphate at one end and a 3' OH at the other. To join nucleotides together you need to attach the phosphate group on the 5' carbon to the OH group of the 3' carbon on the previous nucleotide. The deoxy-ribose sugar that forms the basis of DNA contains 5 carbon atoms numbered 1' - 5'. Carl Sagan, CosmosĭNA is directional due to the fact that nucleotides are not symmetrical. We make our world significant by the courage of our questions and by the depth of our answers. For more open-ended questions, try /r/AskScienceDiscussion | Sign up to be a panelist!.Looking for flair? Sign up to be a panelist!.Neuroscience, Neurology, Neurochemistry, Cognitive NeuroscienceĪskScience AMA Serie: Euclid's First ImagesĪsk Anything Wednesday - Engineering, Mathematics, Computer scienceĪsk Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, PsychologyĪsk Anything Wednesday - Economics, Political Science, Linguistics, AnthropologyĪsk Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Medicine, Oncology, Dentistry, Physiology, Epidemiology, Infectious Disease, Pharmacy, Human Body Psychology, Cognitive Psychology, Developmental Psychology, Abnormal, Social Psychology Social Science, Political Science, Economics, Archaeology, Anthropology, Linguisticsīiology, Evolution, Morphology, Ecology, Synthetic Biology, Microbiology, Cellular Biology, Molecular Biology, Paleontology Mechanical Engineering, Electrical Engineering, Structural Engineering, Computer Engineering, Aerospace EngineeringĬhemistry, Organic Chemistry, Polymers, Biochemistry Mathematics, Statistics, Number Theory, Calculus, AlgebraĪstronomy, Astrophysics, Cosmology, Planetary FormationĬomputing, Artificial Intelligence, Machine Learning, ComputabilityĮarth Science, Atmospheric Science, Oceanography, Geology Theoretical Physics, Experimental Physics, High-energy Physics, Solid-State Physics, Fluid Dynamics, Relativity, Quantum Physics, Plasma Physics /r/AskScienceDiscussion: For open-ended and hypothetical questions. ![]() FAQ: In-depth answers to many popular questions.Weekly Features: Archives of AskAnything Wednesday, FAQ Fridays, and more!.Be civil: Remember the human and follow Reddiquette. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |