PPT-DNA-REPLICATION IN PROKARYOTES

Study Material for BSc Part II Botany Hons Paper IV Dr Pushpanjali Khare Sr . Models of DNA replication: Meselson-Stahl Experiment. DNA synthesis and elongation. DNA polymerases. Origin and initiation of DNA replication. Prokaryote/eukaryote models (circular/linear chromosomes). Eubacteria & . Archarbacteria. Prokaryotes. Unicellular organisms that lack a nucleus. Prokaryotes are identified by characteristics such as shape, the chemical nature of their cell walls, the way they move, and the way they obtain energy.. Chapter . 7.2. Processing of Genetic Material. What is DNA Replication. The process by which the DNA within a cell makes exact copies of itself. Balance of speed and accuracy. Used for growth, repair and embryonic development. Objectives:. 1. Summarize the roles of the different enzymes involved in replication of DNA.. 2. Explain how the leading and lagging strands are replicated differently . Semiconservative. Replication. The function of DNA in the cells is to. preserve genetic information.. transfer genetic information to new cells as the strands of DNA are copied.. DNA Replication. In . DNA replication. ,. the strands in the original or parent DNA molecule separate to allow the synthesis of complementary DNA strands.. Prokaryotic . Structure. size1-5. m. m (resolution of the human eye ~750. m. m). . Cell wall. . main component is peptidoglycan (modified sugar polymers). . can be further differentiated performing a gram stain . DNA REPLICATION. DNA IS COPIED. 1. DURING . S-phase. of . INTERPHASE. PREPARATION FOR CELL DIVISION. SEPARATION. 2. THE . STrAND. OF DNA IS . UNZIPPED. BY . HELICASE. 3. THE POINT OF SEPARATION IS CALLED THE . Dr. Kevin Ahern. Structure. Structure. Structure. One Strand of DNA. Structure. Introduction. Structure. Introduction. DNA Structure. DNA Forms. Semi-Conservative Replication. Discontinuous. Replication. GET READY TO USE THEM. STAND UP NOW . WITH CLICKERS IN HAND. WHEN I GIVE THE SIGNAL,. HOLD YOUR BREATH AS LONG AS YOU CAN.. I will count the time off.. When you can’t hold your breath any longer,. Directions: Front of card write term. On back write definition and draw picture . Chromosomes. Thread-like structure made of coiled DNA. Gene. Segment of DNA that codes for a specific trait. Nucleotide. In . their 1953 announcement of a double helix structure for DNA, Watson and Crick stated, . "It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.". Classifying Prokaryotes. The smallest and most abundant microorganisms on Earth are . prokaryotes. —unicellular organisms that lack a nucleus. . Prokaryotes have DNA, like all other cells, but their DNA is not found in a membrane-bound nuclear envelope as it is in eukaryotes. Prokaryote DNA is located in the cytoplasm. . . What is DNA?. DNA is a . Nucleic Acid in the nucleus. Polymer of . Nucleotides. Each nucleotide consists of. Deoxy. ribose (5-carbon sugar) . Phosphate group. a nitrogen-containing base. Four bases. Mitosis, Protein . Synthesis. Week 8. 9/29 . DNA Replication . 11.1. Obj. TSW demonstrate base pairing rules of DNA Replication by constructing a 2-D model of DNA with paper. . P. 68 NB. Replication Video.