Hank Hymanson Supporting Evidence for the Theory of Cisternal Maturation-Progression Abstract Two competing theories have been postulated for explaining how proteins traverse the Golgi: cisternal maturation-progression and vesicular transport. Cisternal maturation-progression postulates that proteins move through the Golgi within cisternae which progress from cis to medial to trans. Large protein aggregates have been shown to move through the Golgi in a manner consistent with cisternal maturation-progression
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D_____ J_____ CARBOHYDRATES LAB May 22‚ 2013 Pre-lab Questions 1. The water in test tube No. 1 is a negative control. No reaction is expected to occur because water is not a carbohydrate. Reaction by a negative control is evidence of contamination. 2. The color changes expected for positive test results are Benedict’s test: orange to brick red Tollen’s test: metallic silver Starch iodine test: blue-black 3. Identify each of the samples in Part 1 as monosaccharide
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depends on various factors‚ such as temperature‚ pH‚ cofactors‚ activators and inhibitors. Invertase is an enzyme which is usually found in plants. It acts as a catalyst for the hydrolysis of sucrose. Sucrose is a disaccharide composed of glucose and fructose linked by a glycosidic bond. When this bond is cleaved in a hydrolysis reaction‚ an equal amount of glucose and fructose. Invertase is a significant enzyme because glucose is an important product of photosynthesis. Invertase is also used in the
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During which phase of the cell cycle does DNA duplication‚ or replication‚ take place? – interphase When a double helix of DNA is replicated‚ two complete helices are formed. Together‚ these helices are called sister __________. – chromatids During which phase of mitosis do sister chromatids line up at the center of the cell? – metaphase During which phase of mitosis do the sister chromatids move apart? – Anaphase During which phase of mitosis do nuclear envelopes and the nucleoli reappear?
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Simple diffusion and facilitated diffusion both _______. move solutes with their concentration gradient Which of the following would decrease the rate of facilitated diffusion? decreasing the number of carrier proteins What happens to facilitated diffusion when the protein carriers become saturated? The maximum rate of transport will occur. What happened when sodium chloride was added as a solute in the left beaker? There was no change in the transport rate of glucose. Which of the following
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occasionally phosphoric acid) are almost always used as a catalyst. This method is commonly employed in undergraduate teaching labs. Formulations containing high concentrations of aspirin often smell like vinegar because aspirin can decompose through hydrolysis in moist conditions‚ yielding salicylic and acetic acids. The acid dissociation constant (pKa) for acetylsalicylic acid is 3.5 at 25°. Chemical Reactions Discussion of Results 3 grams of Salicylic Acid is equal to 0.0217 mol of the compound
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AP biology FRQ Courtney DeMane 1.22.13 block 7 A). The chemical composition and structure of proteins seems quite confusing at first but one it is broken down into levels it is much more understandable. Amino acids are the basic building blocks of proteins and they contain amino‚ carboxyl and R groups. These R groups that are in the amino acids are what determine the properties of the specific amino acids. For structure‚ there are 4 levels. The first one being the primary level. These are made
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Organic Chemistry/Biochemistry 1: Compounds Important to Life • Biologists classify compounds into organic compounds and inorganic compounds. Organic Compound: a compound that is derived from living things and contains carbon Inorganic Compound: a compound generally derived nonliving things • Water Water is an inorganic molecule with unique properties that make it one of the most important compounds for living things. In the water molecule (H2O)‚ the hydrogen and oxygen atoms bond
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What are the different ways‚ physiological and pharmacological‚ in which blood vessel diameter can be modified? Detection of changes in blood pressure (leading to resultant changes in blood vessel diameter): Baroreceptors at the carotid sinus (the bifurcation of internal and external carotid arteries in the neck) and the aortic arch detect changes in blood pressure. These non-encapsulated nerve endings‚ located in the adventitial layer of arteries‚ are technically mechanoreceptors; they respond
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Chemicals of Life • With the exception of water‚ virtually all chemicals of life are CARBON based • Molecules that contain Carbon are considered organic with some exceptions such as CO2 • Carbon has 4 valence electrons so it is oriented in a tetrahedron shape Sketch→ • Carbon can form up to 4 covalent bonds and can form long chains‚ rings‚ and branched chain molecules • Carbon acts as the backbone of biological molecules • Molecules that only contain carbon and hydrogen are known as hydrocarbons→
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