PPT-Regulation of gene Expression in Prokaryotes & Eukaryotes

1 The trp Operon Contains 5 genes coding for proteins enzymes required for the synthesis of the amino acid tryptophan Also contains a promoter and operator When tryptophan levels in the cell are low the expression of the . 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.. What does the operon model attempt to explain?. the coordinated control of gene expression . in bacteria. bacterial resistance to antibiotics. how genes move between homologous regions of DNA. the mechanism of viral attachment to a host cell. PROKARYOTES. EUKARYOTES. CYTOPLASM. Cell Membrane. DNA. Always single-celled. No Nucleus. DNA is a simple,. Single loop. Small Cells. (1 – 10 . um. ). Bacteria. . Can be single- or multicellular . Homeotic Genes. Type of master gene that controls formation of specific body parts during development. Antennapedia. . Expressed in the thorax causes legs to form. Expressed in the head causes legs to form there also. Outline. Objective. Mechanism. K. inase cascades and Phosphorylation/. dephosphorylation. . General. Learning/LTP. Synaptic strengthening. Control of gene expression. Transcription factors. Epigenetics. 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.. CSCOPE. Unit: 08 Lesson: 01. There are hundreds of different types of cells in your body, and each type has a unique function. We’re going to compare some different types of cells to see how much they have in common. . How do we regulate the expression of our genes? . Involved in gene expression. DNA regulatory sequences. Regulatory genes. Small regulatory proteins (. RNAs. ). Regulatory sequences. Stretches of DNA that interact with regulatory proteins to control transcription.. The cerebellum is the region of the brain that coordinates motor control, and many human neural disorders impact the cerebellum.. Several spontaneous mouse mutants with motor defects have been found, including:. Gene Regulation Gene expression can be turned on, turned off, turned up or turned down! For example, as test time approaches, some of you may note that stomach acid production increases dramatically&# Controlling gene expression is often accomplished by controlling transcription initiation.. Regulatory proteins . bind to DNA to either block or stimulate transcription, depending on how they interact with RNA polymerase.. Study Material for. . . B.Sc. Part II. . Botany . Hons. .. . . Paper IV. . Dr. Pushpanjali Khare. Sr. . Tuesday: Finish Test Analysis. Today:. List . the three components of the cell theory. Note Cards. Most missed quiz. Learning lab. Monday-Thursday. Mornings 7-7:20. Afternoons 2:45-3:15. Glue in your skeleton notes. Eukaryotes. . By prof . Sawsan. . Sajid. AL-. Jubori. .  . transcription.  and its regulation in . prokaryotics. is much simpler. But the eukaryotes have to transcribe and then have a process for mRNA processing like capping, splicing and adding ply adenine tail, and then have a special mechanism to transport the processed mature mRNA to the cytoplasm from the nucleus..