SCI 135 - Second Exam Spring 2018


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. Around here, a lake’s surface freezes when

_______    a. The entire lake is 4o C        b. The entire lake is at 0o C        c. The top layer only is at minus 4o C
                d. The bottom layer only is at minus 4o C            e. You want to go skating but you have to work

        2. In general, if you compare an element’s common ion to its uncharged atom form, the ion should be

_______    a. More likely to be radioactive         b. Chemically more stable        c. Less likely to be radioactive
                d. Chemically less stable                        e. Available in more styles and colors

        3. The current basic definition of a species is based upon

_______    a. Physical resemblance         b. Genetic resemblance         c. Reproductive behavior
                d. Offspring fertility         e. Whichever of the twelve possibilities the dart hit today

        4. Which type of molecules have many different functions because of their limitless
                        ability to be different shapes?

_______    a. Proteins         b. Nucleic Acids         c. Carbohydrates        d. Lipids         e. Silly Putty

        5. Sectioning is done with

_______    a. DNA codes         b. Protein structure        c. Microscope specimens         d. Electron levels
                                        e. My brain – my happy section, and this one

        6. Which is a base bonding combination in nucleic acids?

_______    a. Glucose - Glycerol         b. Thymine - Cytosine        c. Adenine - Guanine
                d. Adenine - Uracil        e. “Base bonding” sounds like we’re sticking statues together

        7. Two different isotopes of the same element have different numbers of

_______    a. Protons         b. Electrons         c. Neutrons         d. Nuclei         e. Zip codes

        8. The pH of digestive juices in the intestine is between 7.5 and 8.5.  Compared with a
                        neutral pH, the concentration of H+ ions should be

__________    a. Higher         b. Lower        c. Equal         d. There's no way to tell
                            e. I guess I shouldn’t have skipped this one in the book

        9. Saturated for a molecule refers to

_______    a. Attached water         b. Bonds inside        c. Energy carried         d. Overall structure
                                                    e. How drunk it got last night

        10. Which term relates to how clearly an imaging system can focus?

_______    a. Resolution         b. Magnification         c. Intrinsicness        d. Clarity         e. Focusabubbliness

        11. Water is often called the universal

_______    a. Solution         b. Solute         c. Solvent        d. Reactor         e. Wetter

        12. Which is not a use for lipids in living things?

_______    a. Storing energy         b. Moving things        c. Hormones         d. Water barriers
                                    e. Making students remember answers


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. What are two features that a water molecule must have in order for it to evaporate?


2. Compounds with ionic bonds very rarely have any function in living systems. Why is that?

3. Give a definition of the term allele.

4. What is the function of each end of an antibody molecule?


5. Name two different types of organic molecules that are polymers.


6. Give two sets of differences between the two types of CHROMOSOMES -



7. What is a hydration shell?

8. What are two different ways that electron microscopes are different from light microscopes?


9.  Label the following chemical reaction with the general terms for each part –
        A         +           B                   x           >           C

    __________                    ___________            ______________                      _____________

10. Why exactly does carbon dating become unreliable after about 60,000 years?

11. When classification scientists want to change a group’s classification -

12. For a lipid molecule, give the components, including how many of each.

13. Put the following groups in order from the largest to the smallest: Class, Family, Genus, Kingdom, Order, Phylum, Species, Superclass, Subfamily.
1 4 7
2 5 8
3 6 9

14. For each, give an example of the process being used in our bodies -

15. What are two different types of protein-based communication molecules?


16. What’s the chemistry meaning of these two word endings?
-ose -ase

17. What are two different things found in non-coding DNA that are still some type of codes?


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.  For four of the six basic Kingdoms of Life, give the name of the Kingdom and enough features to clearly set that Kingdom's members apart from those of the other five.





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





3.  Give four rules from the Cell Theory.



4. For carbohydrates -
Process that makes
most of them -
Two main
forms -
Organisms that
make them -

5.  Using the numbers of bonds as a guide, fill in the symbols for either Carbon, Hydrogen, Nitrogen, or Oxygen.
 Can't recreate the original hand drawing.
O           O           O

          O              O           O           O
                    O                                       O           O
          O               O

6.  All for the most common isotope –

 How many





# 20

Column 2

How many


How many
(Uncharged form)

7.  Microscopes can be split into two main groups based upon either listed feature. For each feature, name the groups.
Nature of the
Imaging Beam
Interaction of Beam
with specimen

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.

How can the emission of radiation cause a change of element? Three Points.

The right-hand column on the test’s periodic table is labeled “0." According to our rules, what should the label be (Three Points), and why does it have a zero on it (Three Points)?

What body functions actually make use of oxygen radicals? Three Points Each.

Why is there so much nitrogen in the atmosphere? Three Points.

What property of water makes fiber a laxative? Three Points.

What is the molecule ATP used for? Three Points.

Why do plants make what we considered digestible starches? Three Points.

What system is supposed to have proteins with low specificity? Three Points.

What type of molecule has been found fairly recently to have many many different varieties doing lots of jobs? Three Points.

Mr. McDarby put out a class email that related to this exam. What was it about specifically? Three Points.


SCI 135 

Michael McDarby

Reconstituted and uploaded Sep 9 2021 724AM

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