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5 Written questions

5 Matching questions

  1. storage
  2. polysaccharides
  3. nucleotide
  4. polymer
  5. disulfide bridges
  1. a the type of protein that stores amino acids; example: ovalbumin is the protein of egg white, used as an amino acid source for developing embryos
  2. b the monomer of nucleic acids that has three parts: 1) a nitrogenous base (A, C, G, T, U); 2) a give-carbon sugar (a pentose); 3) a phosphate group
  3. c macromolecules; polymers with a few hundred to a few thousand monosaccharides joined by glycosidic linkages; serve as storage material, hydrolyzed as needed to provide sugar for cells; building material for structures that protect a cell or an organism; architecture and function are determined by sugar monomers and by positions of glycosidic linkages
  4. d a long molecule consisting of many similar or identical building blocks linked by covalent bonds, much as a train consists of a train of cars; carbohydrates, nucleic acids, and proteins are examples of these
  5. e links that form where two cysteine monomers are brought together by folding of protein; covalent bonds reinforce structure

5 Multiple choice questions

  1. a fat made from saturated fatty acid; animal fats are solid at room temperature because they lack double-bonds, thus flexibility enables molecules to pack together tightly
  2. when two monomers connect to each other by a reaction in which a hydroxyl group covalently bonds to a hydrogen atom, which causes the loss of a water molecule in the process
  3. protein molecules that assist in the proper folding of other proteins; they do not specify the final structure of a protein, instead they keep the new polypeptide separated from "bad influences" in the cytoplasmic environment while it folds
  4. organic molecules possessing both carboxyl and amino groups
  5. the overall protein structure that results from the gathering of polypeptide subunits; some proteins consist of 2 or more polypeptide chains combined into one macromolecule

5 True/False questions

  1. 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


  2. denaturationthe type of protein that selectively accelerates chemical reactions; example: digestive enzymes release polymers in food


  3. unsaturated fatty acida 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)


  4. primary structurethe unique structure of amino acids; example: a polypeptide composed of 127 amino acids has 20^127 different ways it can be organized


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


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