their 1953 Nature publication‚ Watson and Crick announced their landmark discovery: DNA exists in the form of a right handed‚ three-dimensional double helix. They described their DNA model as two DNA strands connected by hydrogen bonds between complementary bases. Adenine bases are always paired with thymines‚ and cytosines are always paired with guanines. Watson and Crick identified the anti-parallel configuration of DNA strands; each 5’ end of one strand is paired with the 3’ end of its complementary
Premium DNA
Background DNA is an abbreviation for deoxyribonucleic acid‚ but it is usually known by its initials alone. DNA is found in practically all living organisms‚ and it is now known to carry genetic information from one cell to the next‚ and from one generation to the next. The units of inheritance‚ called genes‚ are actually sections of the DNA molecule. Nuclei of the cells of higher organisms contain thread-like bodies called chromosomes‚ which consist of DNA‚ wrapped around proteins. So understanding how
Premium Management Crime Medicine
DNA STRUCTURE AND FUNCTION QUIZ Provide answers to each of the following. You may consult your text and fellow students. Each numbered item counts 2 points. 1. If one strand of a DNA double helix has the sequence GTCCAT‚ what is the sequence of the other strand? a. ACTTGC b. CUGGTU c. CAGGTA d. CAGGUA e. TGAACG 2. If a strand of DNA has the sequence AAGCTC‚ transcription will result in a(n) ______. a. single DNA strand with the sequence TTCGAG
Free DNA RNA Protein
DNA STRUCTURE AND REPLICATION One may wonder how a single cell becomes two cells‚ and why this is ultimately important to life. For this essay‚ it would be much too difficult to discuss the process of cell division‚ which is the biological basis of life. That being said‚ this essay will examine more closely the precursor to cell division‚ also known as DNA replication. DNA replication is the process of copying a double-stranded DNA strand on a chromosome within a cell. The process‚ in its totality
Premium DNA
FILM STRUCTURE FILM STRUCTURE What is motion picture film? The American National Standards Institute (ANSI) describes it as “a thick flexible strip of plastic‚ complying with a dimensional standard as defined within‚ whose use is specific to the process of manufacturing a motion picture.” That definition leads to about a dozen pages of further definitions about various aspects of motion picture film. For our purposes‚ let’s take a look at how film is made‚ and how an image is formed on that film. THE
Premium Photographic film Cellulose Silver
Pg. 287 #1‚3‚4 1. Describe the structure of a nucleotide. A nucleotide is a sugar molecule that has 3 parts including a simple sugar‚ a phosphate group and a nitrogenous base. Nucleotides join together forming long chains‚ with the phosphate group of nucleotide bonding to the deoxyribose sugar of an adjacent nucleotide. 3. Explain why the structure of a DNA molecule is often described as a zipper. The structure of a DNA molecule is often described as a zipper because it is made of tow chains
Premium DNA Gene RNA
Singh; Notes: Prof. Singh/ Ganesh Soni 2 What is a composite Material? • Two or more chemically distinct materials combined to have improved properties – Natural/synthetic – Wood is a natural composite of cellulose fiber and lignin. • Cellulose provides strength and the lignin is the "glue" that bonds and stabilizes the fiber. • Bamboo is a wood with hollow cylindrical shape which results in a very light yet stiff structure. Composite fishing poles and golf club shafts copy this design.
Premium Composite material
Chromatography of Commercial Analgesics Chromatography of Commercial Analgesics CHEMISTRY 200L EXPT 4 PAGE 8 - 11 CHEMISTRY 200L EXPT 4 PAGE 8 - 11 Janna Vernice R. Villalon*‚ Christian V. Villanueva‚ Cyd Vincent L. Zamora Department of Chemistry‚ College of Science *Corresponding author; e-mail: janna.villalon@rocketmail.com Abstract In analyzing the chromatography of analgesics‚ thin layer chromatography (TLC) was used. A very thin (micron) film of silica is coated on a glass
Free Chromatography Thin layer chromatography Chemistry
DNA‚ which stands for Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. The main role of DNA molecules is the long-term storage of information. These nucleic acids consist of long chains if chemical units called nucleotides. Nucleic acids are information storage molecules that provide the directions for building proteins. Described by the DNA testing centre‚ Inc.‚ “DNA is found inside the chromosome
Premium
Integrated Physics and Chemistry – Unit 2: The Structure of Matter Experiment: Atomic Structure In this experiment‚ you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment‚" Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass‚ he developed the nuclear model of the atom. Next‚ he set out to determine the relative size of the nucleus
Premium Atom