Transcription is the first step of protein synthesis it uses a sequence of DNA nucleotides to produce a sequence of RNA nucleotide. b. RNA polymerase bonds to RNA nucleotides together‚ attaches to the promoter site at the start of the gene. 4. 5. a. -Messenger RNA contains information to synthesize proteins. -Transfer RNA is used to transfer amino acids during the next step. -Ribosomal RNA makes up part of a ribosome. b. Transcription takes place in the nuclease 6. Translation takes place in the
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Elaine N. Marieb Katja Hoehn CHAPTER PowerPoint® Lecture Slides prepared by Vince Austin‚ Bluegrass Technical and Community College Human Anatomy & Physiology SEVENTH EDITION Cells: The Living Units 3 P ART A Copyright © 2006 Pearson Education‚ Inc.‚ publishing as Benjamin Cummings But First… Let’s clean up… Hydrophobic Hydrophilic Copyright © 2006 Pearson Education‚ Inc.‚ publishing as Benjamin Cummings Plasma Membrane Separates intracellular fluids from extracellular
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DNA synthesis inhibitors Nucleic acid inhibitors are chemicals which inhibit the production of nucleic acids including both DNA and RNA. DNA and RNA inhibitors inhibit enzyme action in DNA replication in the same way as the topoisomerase inhibitors we discussed earlier. Topoisomerase inhibitors (1) (10) are chemicals which interfere with the enzymes that allow DNA strands to separate and to re-join‚ a process that is required for the division of bacteria and without which DNA cannot effectively
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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
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Amino Acids Amino acids are biologically organic compounds containing amine and carboxylic acid functional groups‚ usually along with a side-chain specific to each amino acid. The elements that are key of an amino acid are carbon‚ hydrogen‚ oxygen‚ and nitrogen. There are about 500 different kinds of amino acids found but we recognize 23 of the amino acids that are known‚ they are classified into three groups‚ essential semi-essential‚ and non-essential. Each amino acid has unique characteristics
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“Every aspet of an organism is determined or influenced by the genes of the organism” What genes are‚ what they do‚ how they interact with eachother and the enviroment to generate a phenotype. Genes are segments of DNA that code for proteins or RNA molecules. These genes are the genetic material that is passed down from generation to generation in all species. The individual DNA segments each individual carries are known as their alleles or genotype. When two alleles are identical they are homozygous
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Polymers of nucleotides Informational DNA vs RNA Nucleotides 5C sugar – ribose or deoxyribose nitrogenous base Purine: adenine‚ guanine Pyrimidine: cytosine‚ cytosine thymine thymine‚ uracil Sugar + base = nucleoside Up to 3 phosphate groups nucleotide Several different roles in cell... Fig. 4.12 BIO 1140 – SLIDE 6 H (deoxyribose) Purple pages F29-30 Nucleic acids Polymers of nucleotides Informational DNA vs RNA Nucleotides 5C sugar – ribose or deoxyribose
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primary structure of a polypeptide? mRNA tRNA hnRNA rRNA all of these 3. The nitrogenous base found in RNA but not in DNA is adenine cytosine guanine uracil thymine 4. Transcription occurs on the surface of the ribosome is the final process in the assembly of a protein is the synthesis of any type of RNA from a DNA template
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spontaneous on/off element by a single promoter‚ which is dependent on the DNA binding protein araC. This protein is at the binding site for RNA polymerase at the beginning of the operon‚ so when arabinose is present (like in one of the experimental plates)‚ it is taken up by bacteria and interacts with araC to cause a conformational change. This change ultimately helps RNA polymerase bind and transcribe the GFP gene. After translation‚ the green fluorescent protein and beta-lactamase are produced‚ which
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Nucleic acids‚ DNA and RNA‚ are very important molecules in living organisms. Messenger RNA (mRNA) and transfer RNA (tRNA) are involved in the synthesis of proteins. For each of the statements (a) to (f )‚ put a cross correct statement. in the box that corresponds to the (a) DNA and RNA are polynucleotides composed of mononucleotides joined by (1) A catabolic reactions B condensation reactions C hydrolysis reactions D redox reactions (b) The mononucleotides of RNA consist of a phosphate
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