applied to the understanding of biological polymers and lipid membranes. The emphasis is on properly linking monomers and their polymers‚ and on the structural and functional diversity of the different polymer types. Particular attention is given to protein structure‚ because this is central to understanding subsequent chapters on metabolism‚ molecular biology‚ and molecular medicine. Multiple-Choice Questions 1) Humans and mice differ because A) their cells have different small organic molecules
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prokaryotic cells have intracellular compartments bordered by membranes and a well-defined nucleus. ____ 2. Lipids and proteins are the major components of the plasma membrane. ____ 3. Lysosomes remain fully active by maintaining an acid pH created by pumping hydrogen ions into their interiors. ____ 4. The chief function of ribosomes is to provide sites for lipid synthesis. ____ 5. If cells are deprived of communication from extracellular chemical messengers‚ most cells experience apoptosis
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How to Review for the MCAT You want to review for the MCAT in the most efficient way. First‚ review only the topics that will be on the exam. Second‚ review these exam topics with the test in mind. What this means is that you must do content review in conjunction with working real exam questions. If you just do content review alone‚ then you’ll end up forgetting most of what you went over. However‚ if you work MCAT problems while doing content review‚ you’ll retain most of what you learned. Incidentally
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by helicase & each strand then acts as a template for the next strands Primase creates the DNA primer DNA polymerase III is the main copying enzyme DNA polymerase I removes RNA primers & replaces with DNA Single Stranded Binding Proteins are available to hold the unwound DNA strands in position & prevents premature annealing with another DNA strand Diagram of DNA Replication Role of Ligase Enzyme in the Replication of DNA DNA polymerase ignites the replications next
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(PTS2). In a normal cell‚ the Pex7p receptor has a PTS2 receptor region that recognizes and binds the PTS2 of the localized protein in the cytosol‚ necessary for transport into the peroxisome (Braverman et al. 1993). Pex7p receptor works in conjunction with Pex5p receptor‚ which equivalently recognizes peroxisome-targeting signal 1 (PTS1) on the C-terminal domain of proteins. Once the mobile cytosolic import
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Human Physiology Packet #1 Slate Masunaga Period 6 Table Of Contents: Chapter 1 Vocabulary Chapter 2 Vocabulary Chapter 3 Vocabulary Did you get it Questions Chapters 1-3 (in order) Review Questions Chapters 1-3 Chapter 1 Vocabulary Anatomy: structure Physiology: function Transverse/horizontal: plane that divides body into superior/upper & an inferior/lower sections Sagittal lengthwise plane dividing the body into right & left sections Midsagittal/median: lengthwise
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system Enzyme: protein that serves as a biological catalyst changing the rate of a chemical reaction without itself being changed into a different molecule in the process Enzyme Catalysis: lowers activation energy Exergonic reaction: reactions that yield products that are rich in potential energy. Energy is absorbed form the surroundings as the reaction. Energy is stored in the covalent bonds of the product molecules. Facilitated diffusion: Use of specific transport proteins to move substances
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Bacteria‚ fungi and protists are cells but not virus. Viruses have unique structural and functional properties and cannot reproduce unless they are inside the cell. In fact‚ they can neither generate energy nor make proteins. Virus are extremely small particles comprise mainly of protein and nucleic acid. The range of virions in size is from 10 to 400nm in diameter. Most viruses are too small to be visible in the light microscope and must be viewed with electron microscope.
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contents of each organelle separate from the rest of this cell. The membrane consists of a lipid bilayer that may have channels in order to allow the transport of specific molecules which are needed somewhere else in the cell. An example of this is proteins produced by the ribosomes are then moved to the Golgi apparatus in which they are processed and then sent to the correct part of the cell. | Fig 1 – Diagram of a nucleusSource: http://cdn.nursingcrib.com | The nucleus is a large organelle surrounded
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bilayer‚ peripheral proteins‚ integral protein‚ transmembrane protein‚ sterols‚ glycocalyx Movement across Membranes Simple diffusion: Movement of solute from high concentration to low Facilitative diffusion: Solute combines with transporter protein in membrane Osmosis: water moves across permeable membrane from concentration of high water to low Osmotic pressure: Pressure needed to stop pure water from moving through a membrane Active transport needs transporter protein and ATP Group translocation
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