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Module 1, Unit 5 - Organic Macro-Molecules and Membranes Assignment

Module 1, Unit 5 - Organic Macro-Molecules and Membranes Assignment

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Organic Macro-Molecules and Membranes Assignment 1. What is the most familiar way that atoms and molecules are held together? (1 mark) - The most familiar way that atoms and molecules are held together is the covalent bonds. 2. How does the energy of a covalent bond compare to the thermal energy at body temperature? (2 marks) - The energy of a covalent bond is very high at 80 kilocalories per mole, compared to the thermal energy at body temperature, at 0.6 kilocalories per mole. 3. What is the significance of the energy level of covalent bonds for organisms? (1 mark) - The energy level of covalent bonds for organisms is significant because the high energy level causes molecules to be able to survive over long periods of time and through different conditions. 4. Is the delta charge on a polar molecule a full electronic charge? (1 mark) - No, the delta charge on a polar molecule is not a full electronic charge, it is only a fraction. 5. What is the importance of polar molecules for biochemistry? (1 mark) - Polar molecules are important because they are able to dissolve certain compouds. 6. What molecules have important consequences for biological membranes? (1 mark) - Non-polar molecules have important consequences for biological membranes. 7. Why are these molecules important for biological membranes? (1 mark) - Non-polar molecules are important for biological membranes because they are relatively insoluble in water. 8. Is a hydrogen bond more or less energetic than a covalent bone? (1 mark) - A hydrogen bond is less energetic than a covalent bond. 9. In real life ( which diagrams cannot really show), what are the hydrogen atoms in water doing in relation to the oxygen atoms? (1 mark) - In real life, the hydrogen atoms may be actually bouncing back and forth between the water and oxygen atoms. 10. Why does water not vaporize (become a gas) at room temperature? (1 mark) - Water does no vaporize at room temperature because the water molecules have a strong affinity for one another. 11. When water boils, what effect does this level of thermal energy have on the hydrogen bonds? (1 mark) - The high temperature causes them to rip apart.
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