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5 Written questions

5 Matching questions

  1. lipid
  2. cholesterol
  3. enzymatic
  4. phospholipids
  5. purines
  1. a the type of protein that selectively accelerates chemical reactions; example: digestive enzymes release polymers in food
  2. b cells 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
  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 the family of larger nitrogenous bases in which its members have a six-membered ring fused to a five-membered ring; members are adenine (A) and guanine (G)
  5. e a common component of animal cell membranes, and a foundation from which other steroids are synthesized; crucial molecule in animals, but can be dangerous when in high amounts

5 Multiple choice questions

  1. a fatty acid that has no double-bonded carbon atoms so that as many hydrogen atoms as possible are bonded to the carbon skeleton
  2. the pattern that describes the formation of DNA; the two sugar-phosphate backbones run in opposite 5' >> 3' directions from each other, somewhat like a divided highway
  3. a sugar (monosaccharide) or one of its dimers (disaccharides) or polymers (polysaccharides)
  4. the unraveling and loss of a protein's native shape due to alterations of its environment, such as pH, salt concentration, and temperature; this causes a protein to become biologically inactive
  5. 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 True/False questions

  1. 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)

          

  2. monomersa 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

          

  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. tertiary structurethe 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. hydrolysisa 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

          

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