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5 Written questions

5 Matching questions

  1. amino acids
  2. unsaturated fat
  3. peptide bond
  4. unsaturated fatty acid
  5. cellulose
  1. a a fat made from unsaturated fatty acids; they are liquid at room temperature (oils) because kinks in -cis bonding prevent molecules from packing together to solidify
  2. b a polysaccharide that is a major component of the tough walls that enclose plant cells; most abundant organic compound on Earth; polymer of glucose
  3. c organic molecules possessing both carboxyl and amino groups
  4. d a covalent bond that results when two amino acids join through dehydration reaction
  5. e 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 Multiple choice questions

  1. macromolecules 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
  2. polymers of all amino acids
  3. repeating units that serve as building blocks of a polymer; smaller molecules; some also have functions on their own
  4. the sugar connected to DNA; has one less oxygen atom than the other sugar associated with nucleic acids
  5. a nucleic acid that directs the production of polypeptides; this is found in the cells' ribosomes

5 True/False questions

  1. quaternary structurethe overall shape of a polypeptide that results from interactions between side chains of various amino acids


  2. catalystsa process that occurs when the bonds between two monomers are broken by the addition of water molecules, with a hydrogen from the water attaching to one monomer and a hydroxyl group attaching to the adjacent monomer


  3. contractile and motorthe type of protein that controls movement; example: actin and myosin are responsible for the contraction of muscles; other proteins are responsible for the undulations of cilia and flagella


  4. phospholipidscells need these in order to exist because they make up cell membranes; has 2 fatty acids attached to glycerol instead of traditional 3 (triacylglycerol); always assemble into a double-layer aggregate because of hydrophilic head and hydrophobic tail


  5. storagethe sugar connected to RNA; has one more oxygen atom than the other sugar associated with nucleicacids


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