molecule of polynucleotide chains twined/twisted together into a double helix structure. This molecule is the one that forms the genetic material responsible for transfer hereditary genetic information from one cell to another during cell division. RNA is a single-stranded molecule that contains polynucleotide chain used for the transfer of genetic information especially in bacteria cells (Freifelder‚ 2002). DNA replication process DNA replication is a process by which two DNA molecules are formed
Free DNA Protein DNA replication
heat-killed S cells‚ and heat-killed S cells with living R cells. | Avery‚ McCarty‚ and MacLeod | First to show that DNA was the genetic material‚ but not believed. Repeated Griffith’s experiment‚ but subjected the strains to different enzymes‚ isolating RNA‚ DNA‚ lipids‚ carbohydrates‚ and proteins. Only the DNA killed the mice; the others had the mice survive. | Hershey and Chase | Used T4 bacteriophages in radioactive phosphorus to track DNA and radioactive sulfur to track proteins to determine what
Premium DNA
Biology: Concepts and Connections‚ 6e (Campbell) Chapter 4 A Tour of the Cell Multiple-Choice Questions 1) Which of the following statements about cells is true? A) All cells have cell walls. B) All cells have internal structures that move. C) All cells are attached to other cells. D) All cells are motile. E) All cells have static organelles. Answer: B Topic: Opening Essay Skill: Factual Recall 2) Light microscopes A) can
Premium Cell Organelle Bacteria
and Transmission of DNA and RNA Western Governors University DNA Replication DNA and the function of Ligase mRNA in Transcription and Translation Death by Inhibition: RNA polymerase and the Death Cap Mushroom Ingestion of the Death Cap Mushroom ● ● ● ● ● ● No Presenting symptoms for 48 hours The deadly toxin is alpha-amanitin Amanitin has a great attraction to RNA polymerase It’s toxin blocks RNA polymerase from functioning Without RNA polymerase no proteins can be
Premium Bacteria Immune system Organism
Answer: | the presence or absence of a membranous envelope | | Correct Answer: | the presence or absence of metabolic machinery | | No. This is a difference among viruses. 2. A microbiologist analyzes chemicals obtained from an enveloped RNA virus that infects monkeys. He finds that the viral envelope contains a protein characteristic of monkey cells. Which of the following is the most likely explanation? ( Concept 19.1) Your Answer: | Its presence is a result of the monkey’s immunological
Premium Virus Influenza Bacteria
Nutritional Control of Reproductive Status in Honeybees via DNA Methylation R. Kucharski‚ et al. Science 319‚ 1827 (2008); DOI: 10.1126/science.1153069 The following resources related to this article are available online at www.sciencemag.org (this information is current as of October 6‚ 2008 ): Updated information and services‚ including high-resolution figures‚ can be found in the online version of this article at: http://www.sciencemag.org/cgi/content/full/319/5871/1827 Downloaded from www.sciencemag
Premium DNA Gene expression Epigenetics
Structure and Roles of Nucleic Acids 1.1 illustrate the structure of RNA and DNA using simple labelled diagrams; The genetic substance found in all organisms called DNA or deoxyribonucleic acid is a kind of nucleic acid. Nucleic acids consist of two long polymers of simpler units‚ called nucleotides; that are composed of three (3) main units as shown below: 1) A pentose sugar (deoxyribose in DNA‚ ribose in RNA) 2) A nitrogenous base (a purine or pyrimidine) 3) A phosphate group
Premium DNA
the fluorescence of the Taqman® probe. Limitations: qPCR is an expensive method with high cost of equipment and cost of chemicals. The great sensitivity of this method makes is also its vulnerability‚ as the slightest error in the sample quality‚ RNA extraction or reverse transcriptation process can influence the final result. The result does not represent actual cytokine levels but only the amount of gene expression‚ as post-translational modifications of proteins are not accounted
Premium DNA Molecular biology Gene
nucleotides into DNA molecules is d. DNA polymerase 7. The process by which the genetic code of DNA is copied into a strand of RNA is called b. transcription 8. In messenger RNA‚ each codon specifies a particular c. amino acid 9. Changes in the DNA sequence that affect genetic information are known as b. mutations 10. An expressed gene is one that b. is transcribed into RNA 11. As scientists tried to discover the nature of genes‚ what three critical gene functions had they identified?
Premium DNA
daughter strands. It primes the strands for assembly. Makes RNA primer. 11. DNA polymerase I‚ takes out the RNA primers and puts DNA in its place. 12. RNA primer‚ temporary‚ replaced by DNA (Freudenrich‚ n.d.). DNA Ligase Diagram 5’ Lagging strand DNA polymerase I 3’ 3’ DNA Ligase 5’ 3’ Okazaki’s fragments Leading strand 5’ 5’ 3’ DNA Ligase The concluding stage in DNA replication is Ligase. DNA polymerase I takes away the RNA primers and exchanges them with DNA. This DNA is short Okazaki
Premium DNA replication DNA