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Download Chapters 2-3 Problem Set 1. Please list the three subatomic
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Chapters 2-3 Problem Set 1. Please list the three subatomic particles that make up an atom and their respective charges. Subatomic particle: _______________________! Charge: ______________ Subatomic particle: _______________________! Charge: ______________ Subatomic particle: _______________________! Charge: ______________ 2. State the type of bond that exists at each arrow. ! ! ! ! ! ! ! ! Bond: ____________________ ! ! A ! ! ! Bond at A: ______________________ ! Bond at B: ______________________ ! ! B ! ! ! ! ! ! ! Bond: ______________ 3. What are the four elements that are the most abundant in human beings? Give the atomic numbers for these elements (you can use a periodic table). How many protons does an atom of each element contain? Element: ______________! Atomic #: _____________! Protons: __________ Element: ______________! Atomic #: _____________! Protons: __________ Element: ______________! Atomic #: _____________! Protons: __________ Element: ______________! Atomic #: _____________! Protons: __________ 4. Two atoms interact with each other to form an ionic bond. At the end of this bond, one of the ions has a negative charge, while one has a positive charge. Which of these two atoms (+ or -) is the anion, and which is the cation? Anion = _____ Cation = _____ 5. Given the following information, please state if each substance is an acid or a base. Solution A: Increases the OH- concentration when added to water. Is Solution A an Acid or a Base? _____________________ Solution B: Decreases the pH when added to water. Is Solution B an Acid or a Base? _____________________ Solution C: Increases the pH when added to water. Is Solution C an Acid or a Base? _____________________ Solution D: Increases the H+ concentration when added to water. Is Solution D an Acid or a Base? _____________________ 6. If a buffer has an initial pH of 9, and this buffer has a very high buffering capacity, what do you expect the pH of the buffer to be if we add a weak acid or base to it? Why? pH of the Buffer: ____________ Why? _________________________________________________________________ _____________________________________________________________________. 7. Please give the monomeric units and polymeric units of the classes of macromolecules listed below: Carbohydrates -! ! Monomers: _____________! Polymers: _____________ Proteins -! ! Monomers: _____________! Polymers: _____________ ! 8. Various molecules are listed/shown below, please assign each molecule into one of the four classes of macromolecules (carbohydrates, lipids, proteins, nucleic acids). Lactase! Class of Macromolecules: _______________ Glucose! Class of Macromolecules: _______________ DNA! ! Class of Macromolecules: _______________ ! ! ! ! ! ! ! ! ! ! ! ! Class of Macromolecules: _______________ ! ! ! ! ! ! Class of Macromolecules: _______________ 9. Please classify the following primary, secondary, tertiary, or quaternary structure of a protein. An alpha helix: ___________________ The amino acid sequence of a polypeptide: _____________________ Multiple polypeptides interacting: ____________________ A fully folded polypeptide: ____________________ 10. What is the primary function of monosaccharides in cells? Function: __________________________________ 11. Please draw the following functional groups, and classify them as hydrophobic or hydrophilic: ! ! ! Hydroxyl Group:! ! ! ! ! ! Hydrophobic/Hydrophilic? Carbonyl Group:! ! ! ! ! Hydrophobic/Hydrophilic? Carboxyl Group:! ! ! ! ! Hydrophobic/Hydrophilic? Phosphate Group:! ! ! ! ! Hydrophobic/Hydrophilic? Methyl Group:! ! ! ! Hydrophobic/Hydrophilic? !
