PPT-DNA-REPLICATION IN PROKARYOTES

Study Material for BSc Part II Botany Hons Paper IV Dr Pushpanjali Khare Sr . SC.L.16.3 . Describe . the basic process. of . DNA replication . and how it relates . to the . transmission . and . conservation. of . the genetic information. DNA and Its structure. DNA (deoxyribonucleic acid) is a large organic. 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.. Cell Theory. Every living organism consists of one or more cells.. The cell is the structural and functional unit of life.. All living cells arise by division of preexisting cells.. Cells contain hereditary material, which they pass on to their offspring during division.. 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 . Single-celled organisms. Very tiny. Cannot be seen without a microscope. Our microscopes are not powerful enough. Lack a nucleus and most other organelles. Most numerous organisms on Earth. Extremely important organisms.. 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,. microscopic single celled organisms. collective biomass – . 10x of all eukaryotes!!!!!. vast genetic diversity among members. physical diversity. shapes: . spheres (. coccus. ), rods (bacilli) and spirals. By. Dr. R. C. . Nath. ; Associate Professor. Department of Zoology. Govt. Degree College, DMR. .. Structure of a DNA molecule. `. It . has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material. What makes these two cell classes different?. Cells. The . cell. is the smallest unit of life in the universe.. ALL cells have two things in common:. They have . cell membranes. , which are barriers that separate the inside of a cell from the outside.. 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. . 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. ا . د . جمال احمد عبد الباري. Chromosomes . :. Are DNA- protein complex or nucleoprotein the information transmitted by the genes from one cells to another is stored in the DNA, or in the specific base sequences of DNA macromolecules..