Class Copy

Biochemistry Test

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

  1. An atom's p+ are found in its ____.
    a. molecule c. nucleus e. neutron
    b. shell d. orbital
  2. All atoms of an element have the same number of ____.
    a. e- plus n0 c. p+ plus n0 e. n0
    b. e- d. p+
  3. Nitrogen has an atomic number of 7; therefore it has ____ e- in its outermost electron shell.
    a. one c. three e. five
    b. two d. four
  4. What is the atomic mass of an atom that has six p+, six n0, and six e-?
    a. plus one c. eighteen e. twelve
    b. eight d. six
  5. An atom with an electrical charge is a(n) ____.
    a. isotope c. molecule e. compound
    b. ion d. radioisotope
  6. An atom with a positive charge has ____.
    a. more e- than p+ c. more n0 than p+ e. more p+ than n0
    b. more p+ than e- d. equal numbers of p+ and e-
  7. The bond between oppositely charged ions is a(n) ____ bond.
    a. polar covalent c. covalent e. isotonic
    b. ionic d. hydrogen
  8. What name is given to bonds that involve the sharing of e-?
    a. hydrogen c. isotonic e. van der Waals
    b. covalent d. ionic
  9. The tendency of water molecules to stick together is referred to as ____.
    a. polarity c. adhesion e. cohesion
    b. transpiration d. evaporation
  10. The hydrogens and oxygen of a water molecule are held together by ____ bonds.
    a. osmotic c. hydrolytic e. hydrogen
    b. covalent d. ionic
  11. Water's surface tension and heat storage capacity are accounted for by its ____.
    a. size c. orbitals e. hydrogen bonds
    b. weight d. mass
  12. Why (if you are careful) are you able to float a needle on the surface of water?
    1. The surface tension that is a result of water's cohesive properties make this possible.
    2. The covalent bonds that hold a water molecule together are responsible for this ability.
    3. I learned this at Candy Mountain.
    4. Water exhibits adhesive properties.
    5. A single needle is less dense than water.
  13. The lower the pH of a solution, the ____.
    a. lower the number of atoms c. more acidic the solution e. more basic the solution
    b. higher the OH- concentration d. less toxic the solution
  14. A single carbon atom can form a maximum of ______ covalent bond(s).
    a. no c. two e. four
    b. one d. three
  15. Carbon can form compounds in the shapes of:
    1. chains, links and beads.
    2. chains, branched chains and rings.
    3. chains, branched chains and triangles.
    4. monomers, dimers and polymers.
    5. chains, blocks and ropes.
  16. What name is given to the following reaction? galactose + glucose → lactose + water
    a. gluconeogenesis c. glycolysis e. hydrogenation
    b. dehydration synthesis d. hydrolysis
  17. Given the reaction: galactose + glucose → lactose + water, galactose is a ______.
    a. polysaccharide c. protein e. monomer
    b. polymer d. lipid
  18. A pentose sugar has ___ carbons.
    a. three c. five e. VII
    b. four d. six
  19. Animals store carbohydrates as ______.
    a. starch c. cellulose e. maltose
    b. glycogen d. glucose
  20. The molecule   C6H12O6   is best described as a ______.
    a. nucleic acid c. lipid e. carbohydrate
    b. protein d. hydrocarbon
  21. Cellulose is an example of a ______.
    a. steroid c. nucleic acid e. fat
    b. polymer d. polypeptide
  22. Which of the following is an example of a polysaccharide?
    a. maltose c. sucrose e. starch
    b. glucose d. fructose
  23. Complete the equation: monosaccharide + monosaccharide → ______ + water
    a. nucleic acid c. polysaccharide e. polypeptide
    b. disaccharide d. fat
  24. When a glycerol and 3 fatty acids combine to form a fat there are also ___ molecules of water formed.
    a. one c. three e. six
    b. two d. four
  25. Four linked carbon rings form a lipid group called ____________.
    a. hydrocarbon c. steroid e. paranoid
    b. fatty acid d. wax
  26. What type of fatty acid has double bonds?
    a. unsaturated c. monoglyceride e. saturated
    b. triglyceride d. steroid
  27. What are saturated fats saturated with?
    a. hydrogen c. nitrogen e. carbon
    b. creamy goodness d. oxygen
  28. ______ is a steroid.
    a. Cholesterol c. Butter e. Maltose
    b. Amino acid d. Monounsaturated fat
  29. Proteins are polymers constructed from ______ monomers.
    a. hydrocarbon c. peptide e. 5-carbon ring
    b. amino acid d. nucleotide
  30. Destruction of a protein's shape is called ______.
    a. hydrogenation c. anabolism e. denaturation
    b. hydrolysis d. dehydration synthesis
  31. The chemicals we used such as Biuret and Lugol's solution would change color when
    1. when a starch was present.
    2. when the correct macromolecule was present.
    3. when the correct macromolecule was absent.
    4. the solution was acidic.
    5. rain was coming.
  32. On the back of the answer sheet compare and contrast polymers (for example carbohydrates) and composite molecules (lipids).