PPT-DNA in a Cell

and how is it arranged Mike Clark MD Amount of Genetic Material in a Cell Before we discuss mitosis or meiosis lets examine how much genetic material is in a cell There are two divisions of cells in the human body somatic cells and gametes sex cells. Bacterial . Transformation. Making Competent Cells. 1. Competent cells. Competent cells are bacterial cells that possess more easily altered cell walls by which foreign DNA can be passed through easily. Most types of cells cannot take up DNA efficiently unless they have been exposed to special chemical or electrical treatments to make them competent. . DNA from a few Angles. Cell: . Every cell contains a nucleus which is filled with the directions for cell function, DNA. . Chromosome. : . When DNA is tightly coiled and wound it becomes visible in the form of . “DNA is a helical structure” . with “two co-axial molecules.”. “period is 34 . Å. ” . “one repeating unit contains ten . nucleotides on each of two . . . co-axial molecules.'’. “The phosphate groups lie on the outside of the structural unit, on a helix of diameter about 20 . 7. Lactose digestions in . E. coli. begins with its hydrolysis by the enzyme . -. galactosidase. , . lacZ. , is part of a . coordinatley. regulated operon containing the genes required for lactose utilization. Which of the following figures correctly depicts the interactions at the . DNA damage DNA gets damaged a lot ! DNA damage DNA gets damaged a lot! >200,000 events/human cell/day DNA damage Occurs 2 ways 1) spontaneously 2) mutagens : damage DNA Transposons Discovered by Barbara McClintock  . 5 marks. Question 1 - Answers. U. =Unique sequences; . H. = Highly repetitive sequences. U: occur once in genome; H: occur many times;. U: long base sequences; H: short sequences/5–300 bases;. Discuss this with your partner and be ready to share. DNA. . Oswald Avery . (1944). Discovered that the nucleic acid. , . DNA,. stores . and . transmits . the genetic information from one . generation . BIO…. LIFE….. THINK ABOUT THIS: . What do we do in our lifetime?. What are the major stages of our life?. What are the Major stages of physical development in our lives?. What would it look like.  . Author: Michael Fenech. Affiliation: Genome Health Foundation, North Brighton, SA, 5048, Australia. Email: . mf.ghf@outlook.com. . Introduction. Life as we know it depends entirely on the capacity of cells to utilize energy and molecules in the environment for cellular function and reproduction. . RNA. RNA. Protein. Protein. Scientists call this the:. Central . Dogma. of . Biology!. Part 1: DNA Structure and Replication. What is DNA?. DNA = . D. eoxyribo. n. ucleic . A. cid. It is the blueprint for life – it is the molecule which stores genetic information in ALL living things. Get a sheet of paper and . number . 1-29. Answer are on the last slide. 1. were . credited for finding the structure of DNA. Chargaff. Franklin. Watson . & . Crick. 2. What phase of Mitosis is this?. M13. , f1 and . fd. are filamentous . coliphages. . containing a . circular . single-stranded DNA molecule. . These . coliphages. . have . been developed as cloning . vectors, for . they have a . number . DNA Structure Simulation. Before we begin, let’s investigate the way DNA molecules are set up!. http://learn.genetics.utah.edu/content/molecules/builddna/. The Structure of DNA. What is DNA?. A bit about DNA…. The . hereditary. material. This is what you get from your parents, and what is passed to offspring during reproduction. A type of . nucleic acid . (recall 4 main biological molecules). A characteristic of all living things.