within the orderly environment of the cell. a. The chemistry of life is organized into metabolic pathways Metabolic pathways begin with a specific molecule‚ which is then altered in a series of defined steps to form a specific product. A specific enzyme catalyzes each step of the pathway. Catabolic pathways release energy by breaking down complex molecules to simpler compounds. A major pathway of catabolism is cellular respiration‚ in which the sugar glucose is broken down in the presence of
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Unit 1: Biochemistry Review Chemical Bonding Three types of bonds Ionic bond: 2 oppositely charged atoms (Na and Cl) Polar covalent: Unequally shared electrons (H and O) Non polar covalent: Equally shared electrons (C and C) or similar electronegativity Electronegativity and chemical bonding Electronegativity is a measure of the strength in which an atom can attract electrons. A difference of < 0. 5 is non polar covalent bond A difference of 0.5 – 1.7 is polar covalent bond A difference of > 1
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Title: Investigation of protease activities in different fruit juices Aim: To investigate the protease activities in different fruit juices Background info: Fruit such as pineapple‚ kiwi fruit‚ papaya and guava contain proteases (in different amounts)‚ which can speed up the breakdown of proteins. As milk-agar plate is a milk protein‚ so when it is incubated with fruit juices containing proteases‚ the milk protein will be broken down and clear zones will appear around the wells containing different
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the mucus Digestive System: o Mucus is antiseptic to kill bacteria o Gastric juice contains HCL which has a low pH to kill bacteria‚ by denaturing the pathogen’s enzymes and protease which digests the bacterial cell wall which is made up of protein. o Friendly bacteria in the stomach help to remove harmful bacteria Enzymes such as lysosomes are present in the tears and saliva to destroy any
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What is the function of Factor Xa in the diagram below? Selected Answer: Incorrect cofactor to assist in activating prothrombin Answers: Correct enzyme needed to activate prothrombin coenzyme needed to activate phospholipid cofactor to bind the complex together cofactor to assist in activating prothrombin Question 2 1 out of 1 points Thrombin has many functions in the clotting process. These include all of the following‚ EXCEPT: Selected Answer: Correct Inhibition of Factor VII Answers:
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Suggested answers to Practical Workbook for SBA Ch 1 Introducing biology Practical 1.1 Design an investigation of the effect of fresh pineapple on the setting of jelly Propose a hypothesis (p. 1-2) It is the fresh pineapple that causes the jelly to remain in liquid form. Design and perform an experiment (p. 1-2) 1 (Answer varies with Ss. The recommended quantity of jelly powder and water is stated on the packet of the jelly powder. Jelly will not set if it is too dilute.)
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Abstract This study was undertaken to determine the effects of different environments affecting the rate of reaction‚ PNPP (p-nitrophenyl phosphate) + H20 ? PNP (p-nitrophenol) + H3P04. This reaction is catalyzed by the enzyme phosphatase. Different environments produced different reaction rates as environmental factors affect the efficiency of phosphatase. This is because environmental factors can change the tertiary structure of phosphatase‚ which alters its active site‚ and thus changes its efficiency
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AS Biology Unit 1 page 1 AQA AS Biology Unit 1 Contents Specification Biological Molecules Cells Human Physiology Disease Appendices Chemical bonds Carbohydrates Lipids Proteins Biochemical Tests Enzymes Eukaryotic Cells Prokaryotic Cells Cell Fractionation Microscopy The Cell Membrane Movement across Cell Membranes Exchange The Gas Exchange System Lung Diseases The Heart Coronary Heart Disease The Digestive System Cholera Lifestyle and Disease Defence
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Britain) 17 RESEARCH COMMUNICATION The effect of low temperatures Nicole MORE‚ Roy M. DANIEL* and Helen H. PETACH on enzyme activity Thermophile Research Unit‚ University of Waikato‚ Private Bag 3105‚ Hamilton 2001‚ New Zealand The stability of two enzymes from extreme thermophiles (glutamate dehydrogenase from Thermococcales strain ANI and f‚- enzymes‚ glucosidase from Caldocellum saccharolyticum expressed in Escherichia coli) has been exploited to allow measurement of activity
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In The Hutchinson Unabridged Encyclopedia with Atlas and Weather guide. Retrieved from http://www.credoreference.com.proxy.cecybrary.com/entry/heliconhe/aerobic_respiration Enzyme. (2005). In The American Heritage Science Dictionary. Retrieved from http://www.credoreference.com.proxy.cecybrary.com/entry/hmsciencedict/enzyme Photosynthesis. (2005). In The American Heritage Science Dictionary. Retrieved from http://www.credoreference.com.proxy.cecybrary.com/entry/hmsciencedict/photosynthesis
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