Name___________________________________ Score________________ Section___________________________________ Date_________________ EXERCISE NO. 1a MITOSIS OBJECTIVES The students should be able to: 1. identify the different steps involved in mitosis and meiosis; 2. describe the behavior of the chromosomes during each stage of cell division; 3. identify specific events in mitosis and meiosis that allow the inheritance of traits and generation of variation. MATERIALS
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The plasma membrane surrounds the cytoplasm of living cells‚ physically separating the intracellular components from the extracellular environment. It also plays a role in anchoring the cytoskeleton provide shape to the cell‚ and in attaching to the extracellular matrix and other cells to help group cells together to form tissues. The plasma membrane helps maintain homeostasis by diffusion and osmosis. Osmosis is the diffusion of water across a membrane. Diffusion is the process by which molecules
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is to determine the stress that various alcohols have on biological membranes. Membranes within cells are composed mainly of lipids and proteins and often serve to help maintain order within a cell by containing cellular materials. Different membranes have a variety of specific functions. One type of membrane-bound vacuole found in plant cells‚ the tonoplast‚ is quite large and usually contains water. In beet plants‚ this membrane-bound vacuole also contains a watersoluble red pigment‚ betacyanin
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The Nervous System: Membrane Potential 1. Record the intracellular and extracellular concentrations of the following ions (mM/L): Intracellular Extracellular Sodium (Na+) Potassium (K+) Chloride (Cl–) 2. Excitable cells‚ like neurons‚ are more permeable to ___________ than to ___________. 3. How would the following alterations affect the membrane permeability to K+? Use arrows to indicate the change in permeability. a. An increase in the number of passive K+ channels
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Vol II Issue X Impact Factor : 0.2105 ORIGINAL ARTICLE ISSN No : 2230-7850 Monthly Multidiciplinary Research Journal Indian Streams Research Journal Executive Editor Ashok Yakkaldevi Editor-in-chief H.N.Jagtap IMPACT FACTOR : 0.2105 Welcome to ISRJ RNI MAHMUL/2011/38595 ISSN No.2230-7850 Indian Streams Research Journal is a multidisciplinary research journal‚ published monthly in English‚ Hindi & Marathi Language. All research papers submitted to the journal will be double - blind
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Investigating the effect of temperature on plant cell membranes The purpose of this activity is: • to practise experimental and investigative skills • to investigate the effect of temperature on cell membrane structures Procedure SAFETY: Always carry scalpels clasped to a tile and with the tip pointing away from you. Beetroot cells contain pigments called betalains that give the tissue its dark purple-red colour. The pigment is contained in the cell vacuole. Investigation
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anything covered in lecture may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient? 3. What are the different types of membrane transport? Describe each in detail. Which move solutes
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permeability of the cell membrane: The question being answered from doing this experiment is ‘How do different temperatures affect the permeability of the plasma membrane of beetroot?’ Beetroot contains red pigments called betalains‚ located within the cell vacuole. Normally the pigments cannot pass through membranes but they leak out when the beetroot is cooked or placed in alcohol. The aim of this practical is to use beetroot to examine the effect of temperature on cell membranes and relate the effects
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Vol 455 | 11 September 2008 | doi:10.1038/nature07271 ARTICLES Strigolactone inhibition of shoot branching ` Victoria Gomez-Roldan1‚ Soraya Fermas2‚ Philip B. Brewer3‚ Virginie Puech-Pages1‚ Elizabeth A. Dun3‚ Jean-Paul Pillot2‚ Fabien Letisse4‚ Radoslava Matusova5‚ Saida Danoun1‚ Jean-Charles Portais4‚ ´ Harro Bouwmeester5‚6‚ Guillaume Becard1‚ Christine A. Beveridge3‚7*‚ Catherine Rameau2* & Soizic F. Rochange1* A carotenoid-derived hormonal signal that inhibits shoot branching in plants
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BIOLOGY (ZOOLOGY) Standard XI Untouchability is a sin Untouchability is a crime Untouchability is inhuman TAMIL NADU TEXTBOOK CORPORATION College Road‚ Chennai - 600 006. © Government of Tamilnadu First Edition - 2005 Chairperson Prof. T. SARGUNAM STEPHEN Dept. of Zoology Govt Arts College Nandanam‚ Chennai - 600 035. Reviewers Dr. D. Mony Reader in Zoology R. M. Vivekananda College Mylapore Chennai - 600 004. Dr. D. Sudarsanam Reader and H O D Dept. of Zoology Loyola College
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