SC 135 - First Exam Fall 2012


 Links connect to relevant parts of the online book.




On the line to the left, place the letter of the choice that best  answers the question.

Three Points Each.                  NOTE:  "e" answers are never the correct answer.


   1.       Actin and myosin, the critical molecules involved in

muscle movement, would be

_______                       a.  Carbohydrates                               b.  Nucleic acids

                                    c.  Lipids                                            d.  Proteins

                                    e.  Labeled so you could look and tell what they were




                        2.    What is a saturated molecule saturated with?

_______                     a.  Hydrogen                    b.  Carbon                         c.  Water

                        d.  Salt                             e.  Chocolatey goodness




                        3.   Water is at its most dense at what temperature in Celsius degrees?

_______                    a.   Zero                      b.  One hundred                    c.  Four above

             d.   Four below                      e.  Well, I’m feeling my densest now




                        4.   Which act as catalysts, capable of speeding up a chemical reaction?

_______                    a.  Sugars and starches                    b.   Sugars and enzymes

                                 c.  Starches and lipids                      d.   Enzymes and ribozymes

                                                            e.  Teeny meth dealers




                        5.   In chemistry, organic refers to reactions involving

_______                    a.  Molecules that occur naturally

                                 b.  Molecules containing carbon and hydrogen

                                 c.  Molecules found in plants and fungi

                                 d.  Molecules found in animals

                                 e.  Molecules found in my smellier organs




                        6.   Glycerol is

                                a.  A type of carbohydrate

                                b.  An amino acid

_______                    c.  The difference in the nucleic acid molecules

                                d.  Part of a lipid molecule

                                e.  Kind of a slimy name for a material




                        7.    Which term is used for a variation of a particular gene?

_______                    a.  Microgene                                      b.  Genome

                                 c.  Variant                                          d.  Allele

                                 e.  Second cousin, once removed




                        8.    Which term is connected to unequal sharing of electrons in

                                                covalent bonds?

_______                    a.  Polarity                             b.  Radicals                            c.  Ions

                                 d.  Multiple bonds                   e.  Unfair labor practices




                        9.   Sectioning is done during

_______                    a.  Breakdown of polymers during digestion

                                 b.  Comparison of classification groups

              c.  Preparation of specimens for microscope observation

                                 d.  Preparation of a solution                

                                 e.  The eating of Oreo cookies




                        10.  In a gene, __________   codes for  __________

_______                    a.  RNA …  carbohydrates                     b.  3 nucleotides …  1 amino acid

                                 c.  DNA  …  carbohydrates                    d.  1 nucleotide  …   3 amino acids

                                                        e.  Codey stuff  …  coded stuff




                        11.   The glucose in a can of soda was originally produced by

_______                    a.  Industrial chemistry                    b.  Respiration with oxygen

                                 c.  Photosynthesis                           d.  Respiration without oxygen

                                                e.  By a shaman with a magic sweet tooth




                        12.  Alcohol dehydrogenase is what kind of molecule?

_______                    a.  Protein                                          b.  Carbohydrate

                                 c.  Reactionator                                  d.  Lipid

                                                            e.  Umm, drunk-?




            Answer any eight of the following questions for 4 Points Each.

            Note:  if you answer more than eight, only the first eight  will be corrected.

            You can get partial credit on these answers.

1.   Give two different classes of proteins that communicate, that carry a message from one place to another.



2.   Explain the process of hydrolysis.




3.   Carbon dating of objects only really works if the objects are less than 50,000 years old.  Explain why it does not work on things that are older.



4.     What are two different ways that living things use lipids?



5.    Add the labels for each range of the pH scale.


               2     3     4     5     6     7     8     9     10    11    12    13

Range                                                   |

Name       _______________      _____________       ____________________

6.   What are two ways that RNA is different from DNA?


7.   Researchers are allowed to change one aspect of a group’s classification, but they are not allowed to change another.







8.    The starches made in plants have what two different major uses?



9.   Show with letters what’s on the other DNA strand -


      C    T    T    G    C    A    C    G    T    A    A    G    C    A



10.  Explain why there are almost no ionic compounds found inside cells.



11.  Label the general terms for these parts of a chemical reaction –


           SUCROSE  +  WATER         sucrase    >    GLUCOSE +  FRUCTOSE


       __________      _________    __________        __________    ___________ 

12.  Briefly define and explain the relationship between antibodies and antigens.



13.  What atomic particles are most associated with an atom’s -




14.  Briefly explain why resolution is such an important factor for a microscope.



15.  What are two different functions of non-coding DNA?






Answer any four of the following questions for Eight Points Each.

Note:  if you answer more than four, only the first four will be corrected.

            You can get partial credit on these answers.


1.                        39.09          




Number 19

Column 1

How many


How many


How many


(Uncharged form)


ion form?

2.   Name four of the Six ABasic@ Kingdoms, and for each list enough traits to make it clearly different from the other five.








3.   For three basic properties of water -


What’s happening on the molecular level







4.   Give the terms for each of the two groups in each microscope category -





5.   Using the numbers of bonds as a guide, fill in the symbols for either Carbon, Hydrogen, Nitrogen, or  Oxygen.


O                    O     O     O     O


       O     O     O     O


  O          O     O     O      O     O

6.   Name and give a brief description for the four levels of protein structure.










Link to Answer Key





Answer as many as you are able.  Wrong answers will not result in points being lost from the main exam.   You can get partial credit on these answers.


What group is classified like the six Kingdoms but is not actually included?  Three Points.



The original periodic table groupings, what eventually became the columns, were based upon what feature of the elements?  Three Points.



Why were atomic mass / weight units invented?  Three Points.




Why do the lower levels of the periodic table have “bridges” on them?  Three Points.




What is the main purpose of stomach acid?  What does it do to the molecules in food?  Three Points.




What is ATP?  Three Points.




What sort of on-demand defensive reaction might a plant produce?  Three Points.




What sort of molecule was thought, until recently, to have just a couple of functions, but now is known to have a lot of different ones?  Three Points.




What genetic disease is from a single-point mutation of the hemoglobin gene?  Three Points.










Michael McDarby.

SCI 135

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