1 A) Carbonyl B) Phosphate C) Sulfhydryl D) Hydroxyl E) Methyl 2 A) Amylose glucose residues are held together with b -bonds, which do not hydrolyze as easily as the a -bonds within cellulose. B) Both are made from glucose, but cellulose contains more nitrogen as well. C) Cellulose is found in plants, while amylose is found in animals. D) Cellulose chains are long, unbranched, and straight enough to pack into fibers which resist metabolic breakdown. E) Although both are branching structures, amylose has more branching points than cellulose, and so contains more glucose residues. 3 A) A-G base pairs are more stable than A-C pairs. B) G-C base pairs are probably more durable than A-T pairs. C) Adenine is more common than guanine in an RNA molecule. D) Only DNA uses an alternation of pentose and phosphate in its backbone. E) Nitrogenous bases are hidden from the aqueous environment of the cell in RNA molecules. 4 A) Hydrogen B) Covalent C) Ionic D) Hydrophobic exclusion E) All of the above support tertiary structure in proteins 5 A) Animal fats are based on steroids, such as cholesterol. B) Plant fats are often unsaturated. C) Fatty acids in animals, but not plants, are often branched structures. D) Fatty acids in animal fats are longer than those found in plants. E) Two of the above are true.
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