AIU Lecture Week 1 Online Water PDF

AIU-PT PROF. RASHA NASSRA Medical Biochemistry & Molecular Biology SUBJECTS Water TO BE COVERED Macromolecules (ECM) Enzymology Vitamins & Minerals Cell Membrane & Signal Transduction Molecular Biology...

AIU-PT PROF. RASHA NASSRA Medical Biochemistry & Molecular Biology SUBJECTS Water TO BE COVERED Macromolecules (ECM) Enzymology Vitamins & Minerals Cell Membrane & Signal Transduction Molecular Biology  Students’ learning outcomes BY THE END OF THIS LECTURE, YOU SHOULD BE ABLE TO: 1. UNDERSTAND THE FUNDAMENTAL PROPERTIES OF WATER: POLARITY, HYDROGEN BONDING. 2. ENUMERATE THE FUNCTIONS OF WATER IN BIOLOGICAL SYSTEMS. Body composition Water 75% Protein 15% Fat 10% Minerals 6% Carbohydrates less than 1% STABILIZING FORCES IN MOLECULES STABILIZING FORCES IN MOLECULES BONDS BONDS  DEFINITION/ STUCTURE/ PROPERTIES/ FUNCTIONS WATER  SOME BIOLOGICAL FUNCTIONS OF WATER ✔VITAL BODY FLUID ESSENTIAL FOR REGULATING DIGESTION, TRANSPORT OF NUTRIENTS, AND EXCRETION. WATER DISSOLVES IONIC AND POLAR ORGANIC COMPOUNDS AND ALLOWS THE TRANSPORTATION OF THE PRODUCTS OF DIGESTION TO THE PLACE OF REQUIREMENT IN THE BODY. ✔THE MEDIUM FOR ALL METABOLIC REACTIONS IN THE BODY.  SOME BIOLOGICAL FUNCTIONS OF WATER ✔REGULATES BODY TEMPERATURE THROUGH THE PROCESS OF SWEATING AND EVAPORATION. **WATER HAS A HIGH SPECIFIC HEAT BECAUSE IT TAKES A LOT OF ENERGY TO RAISE OR LOWER THE TEMPERATURE OF WATER. AS A RESULT, WATER PLAYS A VERY IMPORTANT ROLE IN TEMPERATURE REGULATION. SINCE CELLS ARE MADE UP OF WATER, THIS PROPERTY HELPS TO MAINTAIN HOMEOSTASIS.  SOME BIOLOGICAL FUNCTIONS OF WATER ✔CONTRIBUTES TO THE FORMATION OF VARIOUS BIOLOGICAL MEMBRANES BY INTERACTION WITH VARIOUS ORGANIC COMPOUNDS. ✔IMPACTS THE FUNDAMENTAL COMPONENTS OF ALL CELLS LIKE DNA AND PROTEINS WHERE HYDROGEN BONDING REGULATES THE FOLDING OF PROTEINS AND NUCLEIC ACIDS. NEXT TIME The specific heat of water is: A. High B. Low C. Moderate D. None of the above The specific heat of water is: A. High B. Low C. Moderate D. None of the above The property that can make water resistant to changing in its temperature: A. High surface tension B. High specific heat C. Its V shape D. Covalent bond between water molecules The property that can make water resistant to changing in its temperature: A. High surface tension B. High specific heat C. Its V shape D. Covalent bond between water molecules Which of the following is true about electronegativity of oxygen and hydrogen? A. Hydrogen is more electronegative than oxygen B. Oxygen is more electronegative than hydrogen C. Oxygen and hydrogen have the same electronegativity Which of the following is true about electronegativity of oxygen and hydrogen? A. Hydrogen is more electronegative than oxygen B. Oxygen is more electronegative than hydrogen C. Oxygen and hydrogen have the same electronegativity The oxygen atom in a water molecule due to its high electronegativity bears: A. one negative charge B. Two negative charges C. One positive charge D. Two positive charges The oxygen atom in a water molecule due to its high electronegativity bears: A. one negative charge B. Two negative charges C. One positive charge D. Two positive charges Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely: A) Positively charged B) Negatively charged C) Without charge D) Hydrophobic E) Nonpolar Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely: A) Positively charged B) Negatively charged C) Without charge D) Hydrophobic E) Nonpolar