BCH 3023 – Fall 2008 Final Exam‚ 12/8/2008 Name: _________________________________ 1. The GTP analog‚ ‚-imidoguanosine 5’-triphosphate (Gpp(NH)p)‚ shown below‚ cannot be hydrolyzed between the and phosphates. Predict the effect of microinjection of Gpp(NH)p of G-protein coupled signaling. O N NH O O H N P OO O P OH OH OH O H N N NH2 - O P O- O H H a. Gpp(NH)p is a substrate for adenylate cyclase and‚ thus‚ will decrease the intracellular concentration of
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The structural features of carbohydrates account for the fact that a wide variety of polysaccharides exist is pentoses and hexoses. The examples of pentose are ribose‚ deoxyribose‚ ribulose and xylulose. The examples of hexose are glucose which is found in fruits‚ fructose which is found in milk and galactose which is found in honey. Both pentoses and hexoses are mostly found in monosaccharides. They are the most simplest sugar which cannot be futher hydrolysed into smaller units. They contain
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energy from glucose. What are the central ideas of Movement of Substances? • What processes describe how substances move from one region to another? – osmosis‚ or – diffusion‚ or – active transport. • What is the above dependent on? – Type of substance – Concentration gradient or water potential gradient. What is the link between Cells & Movement of Substances? • Cells take in raw materials to make new substances such as proteins and fats. • Cells also take in glucose and water
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If you exercise regularly or if you are an athlete in training‚ you are trying to make your muscles work better. You want to be stronger if you are a weightlifter‚ you want to be able to throw a blistering fast ball if you are a baseball pitcher or you want to be able to finish strong at the end of a 26-mile race if you are a marathon runner. Adequate nutrition is a key component of sports performance. The greater the demands for increased performance both in training and competition‚ the higher
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built from glucose molecules bonded covalently together through a process known as hydrolysis. Hydrolysis is a chemical process in which a molecule of water is added to a substance. Each alternating glucose ring of the cellulose molecule is flipped over and the water molecule (H2O) has been split out leaving an oxygen molecule between each ring. This chain or ribbon (the cellulose molecule) will continue for 3‚000 to 5‚000 glucose units. Starch is a polysaccharide comprising glucose monomers joined
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http://www.lef.org/ Life Extension Magazine October 2011 Wheat: The Unhealthy Whole Grain Book Excerpt: Wheat Belly By William Davis‚ MD Flip through your parents’ or grandparents’ family albums and you’re likely to be struck by how thin everyone looks. The women probably wore size-four dresses and the men sported 32-inch waists. Overweight was something measured only by a few pounds; obesity rare. Overweight children? Almost never. Any 42-inch waists? Not here. Two-hundred-pound teenagers
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glycogen and starch is glucose (homopolysaccharides). 3. How do starch and glycogen differ structurally? * Starch‚ a complex carbohydrate‚ is a polymer of glucose molecules. It occurs in two main forms: amylose and amylopectin Characteristic | Amylose | Amylopectin | Chain | Straight chain | Highly branched | Linkage | 1-4 glycosidic linkage | Both 1-4 and 1-6 glycosidic linkage | % in Starch | 15-20% | 80-85% | No. of Units | 300-500 monomer units | 25-30 glucose units | Molecular
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used to identify carbohydrates and proteins in the laboratory. Materials: 7 clean test tubes plus test tube rack dropper bottles of 1% starch‚ 1% protein‚ 1% glucose‚ and distilled water (DW)‚ slurries of honey‚ egg white‚ and saltine crackers dropper of IKI solution (starch test) dropper bottle of Benedict’s reagent (glucose test) dropper bottles of 10% NaOH and 2% CuSO4 (Biuret Reagents – protein test) 95ºC water bath masking tape for labeling test tubes Procedure: Biuret test
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must occur with each mechanism of metabolism‚ forming metabolic pathways. When we study photosynthesis in next week’s lab‚ you will investigate the metabolic pathways in which green plants capture light energy to produce the carbohydrate known as glucose. Carbohydrates can be used as temporary stores of energy. They can be broken down more readily than other‚ more complex molecules for a quick source of usable energy. The process by which usable energy is released from carbohydrates and captured
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iLab #2 Carbohydrate Tests INTRODUCTION - For this experiment we will be testing four different bacteria with four different tests‚ using glucose‚ lactose‚ and sucrose. Hopefully we will use the information from those test to be able to identify the organisms in each of the samples from the case studies. We will use the results from the four different tests along with the information of how different bacteria react to match up to the case
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