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Endomembrane system

Campbell Biology Chapter 6

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? 2017 Pearson Education, Inc. Lecture Presentations byNicole Tunbridge and Kathleen Fitzpatrick Chapter 6A Tour of the Cell 1 Concept 6.2: Eukaryotic cells haveinternal membranes that compartmentalizetheir functions The basic structural and functional unit of every organism is one of two types of cells: Prokaryotic Eukaryotic Only organisms of the domains Bacteria and Archaea consist of prokaryotic cells Protists, fungi, animals, and plants all consist of eukaryotic cells ? 2017 Pearson Education, Inc. Comparing Prokaryotic and Eukaryotic Cells Basic features of all cells: Plasma membrane Semifluid substance called cytosol Chromosomes (carry genes) Ribosomes (make proteins) ? 2017 Pearson Education, Inc. Prokaryotic cells are characterized by having No nucleus

Campbell Biology 9th Edition Chapter 6

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A Tour of the Cell Chapter 6 Concept 6.2: Eukaryotic cells have internal membranes that compartmentalize their functions The basic structural and functional unit of every organism is one of two types of cells: prokaryotic or eukaryotic Only organisms of the domains Bacteria and Archaea consist of prokaryotic cells Protists, fungi, animals, and plants all consist of eukaryotic cells ? 2011 Pearson Education, Inc. Comparing Prokaryotic and Eukaryotic Cells Basic features of all cells Plasma membrane Semifluid substance called cytosol Chromosomes (carry genes) Ribosomes (make proteins) ? 2011 Pearson Education, Inc. Prokaryotic cells are characterized by having No nucleus DNA in an unbound region called the nucleoid No membrane-bound organelles

Campbell Biology 9th Edition Chapter 6

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CHAPTER 6: A TOUR OF THE CELL Overview: The Fundamental Units of Life All organisms are made of cells The cell is the simplest collection of matter that can be alive Cell structure is correlated to cellular function All cells are related by their descent from earlier cells Concept 6.1: Biologists use microscopes and the tools of biochemistry to study cells Though usually too small to be seen by the unaided eye, cells can be complex Microscopy Scientists use microscopes to visualize cells too small to see with the naked eye In a light microscope (LM), visible light is passed through a specimen and then through glass lenses Lenses refract (bend) the light, so that the image is magnified Three important parameters of microscopy

Pearson Biology Guided Reading Chapter 4

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Chapter 4: A Tour of the Cell 24 Copyright ? 2015 Pearson Education, Inc. Name ________________________ Period _________ # 152826 Cust: Pearson Au: Reece Pg. No. 24 Title: Active Reading Guide for Campbell Biology: Concepts & Connections, 8e C / M / Y / K Short / Normal DESIGN SERVICES OF S4-CARLISLE Publishing Services Chapter 4: A Tour of the Cell Guided Reading Activities Big idea: Introduction to the cell Answer the following questions as you read modules 4.1?4.4: 1. A(n) ____________ uses a beam of light to illuminate the specimen. 2. Beginning students usually confuse magnification and resolution. Briefly compare magnifica- tion with resolution. 3. Which of the following associations is incorrect? a. Light microscope; live bacterial cell

Pearson Biology Guided Reading Answers Chapter 4

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Chapter 4: A Tour of the Cell 24 Copyright ? 2015 Pearson Education, Inc. Name ________________________ Period _________ # 152826 Cust: Pearson Au: Reece Pg. No. 24 Title: Active Reading Guide for Campbell Biology: Concepts & Connections, 8e C / M / Y / K Short / Normal DESIGN SERVICES OF S4-CARLISLE Publishing Services Chapter 4: A Tour of the Cell Guided Reading Activities Big idea: Introduction to the cell Answer the following questions as you read modules 4.1?4.4: 1. A(n) _______________ uses a beam of light to illuminate the specimen. 2. Beginning students usually confuse magnification and resolution. Briefly compare magnifica- tion with resolution. 3. Which of the following associations is incorrect? a. Light microscope; live bacterial cell

Pearson Guided Reading Activities

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Chapter 4: A Tour of the Cell 24 Copyright ? 2015 Pearson Education, Inc. Name ________________________ Period _________ # 152826 Cust: Pearson Au: Reece Pg. No. 24 Title: Active Reading Guide for Campbell Biology: Concepts & Connections, 8e C / M / Y / K Short / Normal DESIGN SERVICES OF S4-CARLISLE Publishing Services Chapter 4: A Tour of the Cell Guided Reading Activities Big idea: Introduction to the cell Answer the following questions as you read modules 4.1?4.4: 1. A(n) ____________ uses a beam of light to illuminate the specimen. 2. Beginning students usually confuse magnification and resolution. Briefly compare magnifica- tion with resolution. 3. Which of the following associations is incorrect? a. Light microscope; live bacterial cell

Pearson Guided Reading Activities KEY CH4

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Chapter 4: A Tour of the Cell 24 Copyright ? 2015 Pearson Education, Inc. Name ________________________ Period _________ # 152826 Cust: Pearson Au: Reece Pg. No. 24 Title: Active Reading Guide for Campbell Biology: Concepts & Connections, 8e C / M / Y / K Short / Normal DESIGN SERVICES OF S4-CARLISLE Publishing Services Chapter 4: A Tour of the Cell Guided Reading Activities Big idea: Introduction to the cell Answer the following questions as you read modules 4.1?4.4: 1. A(n) _______________ uses a beam of light to illuminate the specimen. 2. Beginning students usually confuse magnification and resolution. Briefly compare magnifica- tion with resolution. 3. Which of the following associations is incorrect? a. Light microscope; live bacterial cell

Endo-membrane System

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Endomembrane system 4/7/16 Proteins synthesized in the ER enter the endomembrane system Comprises a transport system whereby material flows between the ER, Golgi, endosomes, lysosomes, and the plasma membrane REMEMBER: Rough ER is involved in biosynthesis and processing of proteins Smooth ER is involved in drug detoxification, carbohydrate metabolism, steroid biosynthesis Network of small tubes Both water-soluble and transmembrane proteins are co-translated: Soluble ? completely translocated across the ER membrane into the lumen Default pathway = SECRETION Transmembrane ? partly translocated and will reside in the membrane Default pathway = PLASMA MEMBRANE Most proteins that enter the endomembrane system get glycosylated cytosolic proteins are generally not glycosylated

Protein Sorting

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Protein Sorting 3/29/16 Organelles contain sets of proteins that are specific to their functions What is the function of the following organelles, and what types of proteins might be found in them? Nucleus? Transcription - RNA polymerase Transcription - transcription factor Replication - Mitochondria? ATP synthesis - ATP synthase Golgi? Synthesis of most proteins begins on ribosomes in the cytosol Cytosol - everything inside the cell that is not enclosed by membrane How are proteins delivered to the correct location? Signal sequences direct proteins to the correct compartment Short (15-60 aa) sequence in protein, specifies where it should go Inherent sequence coded for in the DNA information EX- NLS: nuclear localization signal Signal sequences function like zip codes!

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