2.2 Movement in and out Cells 1 Define diffusion Diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration down a concentration gradient‚ as a result of their random movement 2 Describe the importance of diffusion of gases and solutes and of water as a solvent. Gases Necessary for gas exchange in all living organisms Necessary for obtaining Carbon Dioxide and releasing oxygen during photosynthesis. Solutes (liquids) Dissolved salts
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Kelly Smith Bio1201 S013 25 February 2014 The Impact of Dinoflagellates The Phylum Dinoflagellata is in the Kingdom Alvoelata. Previously belonging to Kingdom Protista but have since been broken up into different kingdoms ("What Are Dinoflagellates?"). Approximately 4500 species have been described and organized into 550 genera. Almost three quarters of the genera and more than half of the species are fossil. Around 1700 are marine and about 220 are living in freshwater. Their specie growth is
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Bio 93 Review Sheet: 1. Understand all the THEMES presented in the introductory lecture (lec 1). 2. What is an open system? Energy in and out‚ comes in and leaves as heat 3. What are the 4 most important elements in the human body? C‚ O‚ N‚ H 4. Draw the periodic square for Helium. How many valence electrons does it have? How do you figure this out using the periodic table? Two valence e-‚ 23He‚ all the way right full shell only holds two electrons 5. What is an isotope? How are they used
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Study guide for exam 2. Chapter 7 ‐ Membrane Structure and Function Define fluid mosaic model semi‐permeability amphipathic molecules What is the effect of unsaturated fatty acids on membrane structure and properties? What is the effect of cholesterol on membrane structure and properties? Membrane Proteins and Their Functions peripheral Integral proteins Classification based on function (transport‚ enzymatic activity‚ cell‐cell interactions‚ etc.) How do proteins get to cell surface
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absorb filtered wavelength in deep water (Biology Lab Manuel 2012). They differ in solubility of water and polarity because of their chemical structures. Plants ands green algae share a recent common ancestor because of the genetic similarities of chloroplasts in both species (Campbell et al.‚ 2008). These photosynthetic pigments are important in the part of biology of algae‚ cyanobacteria‚ and plants that reveals the evolutionary relationships between the two and other photosynthetic organisms (Biology
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Macromolecules of Life Hands-On Labs‚ Inc. Version 42-0085-00-01 Lab Report Assistant ________________ Name: Akil Kelly Exercise 1: Testing for Proteins Data Table 1: Biuret results. Substance Tested Predicted Results Biuret Color & Number of drops added 1: Egg white Contains Protein Purple color – 9 drops 2: Pepsin Contains Protein Purple color – 9 drops 3: Sugar Doesn’t contain protein Blue
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membranes of the chloroplast; here photons from the sun strike molecules of chlorophyll a‚ exciting the electrons into a higher energy state. In a series of reactions the energy is converted into ATP and NADPH. During this process water is split and oxygen is released as a byproduct. ATP and NADPH are then used in the dark reactions to produce glucose (Hoefnagels‚ 2012‚ p.96). The dark reactions‚ also known as the Calvin Cycle‚ or light independent reaction‚ occur in the stroma of the chloroplast. During
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Name: Block: Honors Biology – Mid Term Review |Characteristics of Life | | |What is the difference between stimulus and response?|Stimulus: causes you to react/respond‚ ex: something that irritates your eyes | |Give an example of each |Response: reaction to/response to a stimulus‚ ex:
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SBI4U - Practice Exam Part A: Multiple Choice 1. When organic molecules are joined together and a water molecule is removed‚ the reaction is called which of the following? A. Dehydration synthesis. B. Hydrogenation. C. Hydrolysis. D. Oxidation. What is a nucleotide composed of? A. Nitrogenous base‚ 6 carbon sugar and a phosphate group. B. Nitrogenous base‚ 5 carbon sugar and a phosphorus group. C. Nitrogenous base‚ 5 carbon sugar and a phosphate group. D. None of the above. Enzymes work as catalysts
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of technological advances to developments in the cell theory * Identify cell organelles seen with current light and electron microscopes In light microscopes the organelles that could be seen were cell wall‚ cytoplasm‚ nucleus‚ nucleolus‚ chloroplast‚ water vacuole and cell membrane. * Describe the relationship between the structure of cell organelles and their function 2. Membranes around cells provide separation from and links with the external environment * Identify the major
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