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
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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?
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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
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RNA phage are used for determination of sewage contamination because : a. they infect E.coli b. there are a lot of them in sewage c. they are simple d. they have T=3 symmetry e. they replicate rapidly 31. How many proteins are encoded by a “typical” ssRNA
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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
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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
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flow of information is depicted as: DNA --> RNA --> protein. Both DNA and RNA can be replicated (i.e. DNA is synthesized from DNA‚ and RNA from RNA). RNA can be made or transcribed from DNA. It is called transcription since the same type of "language" is used in DNA and RNA -- i.e. nucleic acids. In some cases RNA may be used to make DNA (i.e. "reverse transcription") using a particular enzyme called reverse transcriptase. Protein is synthesized from RNA by translation. It is called translation‚ because
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Name: Cora Wilke April 19‚ 2015 Laboratory 7: Building models of Biological MacromoleculesQuestions: 1. Which functional groups are involved in buiding a covalent bond between these amino acids? Amine and Carboxylic acid = Amide 2. When the covalent bond is built between alanine and glycine‚ which functional group will alanine use for peptide bond? Carboxylic Acid 3. When the covalent bond is built between alanine and glycine‚ which functional group will glycine use for peptide bond? Amine
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membrane 2. Contain nucleic acid that encodes at least one complete copy of a genome a. Originally RNA… these days‚ exclusively DNA b. All cells replicate DNA by template directed polymerization into an intermediate form RNA 3. Capable of regulated metabolic activity a. Through macromolecular catalysis 4. Capable of protein synthesis a. The machinery of protein synthesis is conserved among all cells (MOSTLY RNA) b. The mechanism of protein synthesis is also conserved c. Three domain (archae‚ bacteria‚
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Answer the following in at least 100 words: 1. Describe the structure of DNA. ➢ DNA is a nucleic acid‚ which consist of long chains (polymers) of chemical units (monomers) called nucleotide. A molecule of DNA contains two polynucleotides‚ each a chain of nucleotides. Each nucleotide consists of a nitrogenous base‚ a sugar‚ and a phosphate group. Each DNA strand serves as a mold‚ or template‚ to guide reproduction of the other strand. There are four different types of nucleotides found in DNA
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