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5 Written Questions

5 Matching Questions

  1. lipid
  2. pyrimidines
  3. triacylglycerol
  4. monomers
  5. unsaturated fatty acid
  1. a the family of smaller nitrogenous bases in which its members have six-membered rings of carbon and nitrogen atoms; members include cytosine (C), thymine (T), and uracil (U)
  2. b repeating units that serve as building blocks of a polymer; smaller molecules; some also have functions on their own
  3. c one of a group of compounds, including fats, phospholipids, and steroids, that mix poorly, if at all, with water; they are not composed of true polymers, so they are generally not large enough to be considered macromolecules; they are hydrophobic because they contain few polar bonds and many hydrocarbon regions; they vary in form and function
  4. d a fatty acid that has one or more double-bonded carbon atoms formed by the removal of hydrogen atoms from the carbon skeleton; there will be a kink in the hydrocarbon chain wherever a -cis double-bond occurs (causes bending)
  5. e a fat that consists of three fatty acids linked to one glycerol molecule; linkages that bond hydroxyl to carboxyl are called ester linkages

5 Multiple Choice Questions

  1. lipids characterized by a carbon skeleton consisting of four fused rings
  2. a sugar (monosaccharide) or one of its dimers (disaccharides) or polymers (polysaccharides)
  3. the sugar connected to RNA; has one more oxygen atom than the other sugar associated with nucleicacids
  4. the fat that results when unsaturated fats are synthetically converted to saturated fats to prevent the separation of lipids (margarine and peanut butter are examples); this process produces saturated fats and unsaturated fats with trans double bonds
  5. the type of protein that selectively accelerates chemical reactions; example: digestive enzymes release polymers in food

5 True/False Questions

  1. messenger RNAa nucleic acid that directs the production of polypeptides; this is found in the cells' ribosomes


  2. peptide bondmacromolecules that are constructed from one or more polypeptides, each folded and coiled into a specific three-dimensional structure; all made from same 20 amino acids; most structurally sophisticated molecule known


  3. proteinsan important structural polysaccharide used by arthropods to build their exoskeletons; pure forms of this are leathery and flexible, but they harden when encased within calcium carbonate


  4. transportrepeating units that serve as building blocks of a polymer; smaller molecules; some also have functions on their own


  5. alpha helixa secondary structure that is a delicate coil held together by hydrogen bonding between every fourth amino acid


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