Explain how the language in this extract influences the reader’s view of the significance of Slim. (16) Slim is introduced as a respected man with great influence over the other ranch hands‚ without the need to wear his authority‚ as shown by the boss and Curley. His friendliness to George and Lennie is consistently shown throughout the extract. Furthermore‚ his skill on the ranch is shown to be superior to the other characters. Slim is compared to ‘royalty’ in the extract; he is described as
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a polypeptide. (2) a sequence of DNA that produces tRNA’s. (3) a sequence of DNA that interacts with the small ribosomal subunit. (4) a sequence of DNA that is recognized by RNA polymerase. (5) a sequence of DNA that is involved in forming the structure of a double helix molecule. 3. Identify the correct sequence of steps in protein synthesis in prokaryotes: A - binding of large ribosomal subunit to initiation complex B - peptide bond formation C - binding of mRNA to small subunit of ribosome D -
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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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Eukaryotes Basal level - Low level of transcription Activators - Gene specific transcription factors Enhancers - Regulatory sequences that augment transcription Silencers - Regulatory sequences that diminish transcription Initiator - RNA polymerase II - Promoter‚ together with TATA (TFIID) *Looping enhances transcription Transcription-coupled Repair (TCR) - DNA repair mechanism Response Elements - Enhancers that respond to metabolic factors - Ex. Heat-shock element (HSE)
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Elongation of the RNA Strand * The congregation of many polymerase molecules simultaneously transcribing a single gene increases the amount of mRNA transcribed from it‚ which helps the cell make the encoded protein in large amounts. * A single gene can be transcribed simultaneously by several molecules of RNA polymerase following each other like trucks in a convoy. * The enzyme adds nucleotides to the 3’ end of the growing RNA molecule as it continues along the double
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Cell Microstructure and function Smooth endoplasmic reticulum Nucleolus Chromosomes Transfer RNA DNA Messenger RNA Centrioles Phospholipids Rough endoplasmic reticulum Cell Membrane Nucleus Golgi apparatus Mitochondria Lysosomes Cell membrane Cell membrane is a thin‚ elastically‚ living semi permeable membrane so it controls what goes in and out of the cells. Cell membrane is also made up of two layers of lipids with protein molecules between them which
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carries the information‚ which the cell needs to divide and carry out all its cellular processes. Inside eukaryotic cells‚ the DNA is associated with histone proteins‚ and is called chromatin. When the DNA is transcribed into RNA the structure of the chromatin changes to allow the RNA polymerase enzyme to access the DNA strand. When the cell divides to form new cells‚ the chromosomes coil up more tightly than usual. The chromosomes are moved to opposite ends of the cell so that‚ when the cell splits‚ each
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codon) and then it jumps off because it has the whole recipe copied. The polymerase uses complimentary base pairing to attach RNA nucleotides to the second strand with the exception that it attaches Uracil in place of Thymine. The row of “guitars” represent the transfer RNA (tRNA) which transfers a specific active amino acid to a growing polypeptide chain at the ribosomal site of protein synthesis during translation. Each tan ball in the diagram represents an amino acid. The multi-color “piano keys’
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DNA Worksheet Trisha McCabe SCI/230 May 8th 20132 Chandreyi Basu‚ PhD Associate Program Material DNA Worksheet Answer the following in at least 100 words: 1. Describe the structure of DNA. DNA made up of units called nucleotides‚ nucleotides are made up of three molecules components‚ a nitrogen base‚ a sugar‚ and a phosphate (Simon‚ Reece‚ Dickey‚ 2010). The nucleotides are joined together by bonds between the sugar of one nucleotide and the phosphate of the next producing
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Polypeptide (protein) Protein Synthesis Flow of Information: DNA RNA Proteins Transcription Translation Transcription is the process by which a molecule of DNA is copied into a complementary strand of RNA. This is called messenger RNA (mRNA) because it acts as a messenger between DNA and the ribosomes where protein synthesis is carried out. Protein Synthesis Transcription Transcription process •RNA polymerase (an enzyme) attaches to DNA at a special sequence that serves
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