SCI 135 - Second Exam Fall 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. A gene is made up of

_______    a. Proteins         b. RNA         c. Codons        d. Lipids         e. Icky biology stuff

        2. If you’re making Kool-Aid from the powder, the powder is the

_______    a. Solution         b. Solute         c. Solvent        d. Hydrater         e. Stuff you shouldn’t eat straight

        3. Free radicals are always

_______    a. Single atoms         b. Single molecules         c. Charged        d. Uncharged        d. Yelling on the internet

        4. A molecule that is critical in aging research is telomerase. What class of molecule would that be?

_______    a. Lipid         b. Nucleic acid         c. Protein        d. Carbohydrate         e. Old?

        5. Which depends upon attractions between partial charges?

_______    a. Polar bonds         b. Covalent bonds        c. Semivalent bonds         d. Hydrogen bonds
                                        e. Not-completely committed boyfriend bonds

        6. Which is most closely connected to the resolution of a system?

_______   a. Ability to magnify        b. How it can answer a question        c. Ability of focus clearly
                d. How molecules interact inside it                e. Isn’t that a New Year’s thing?

        7. Sectioning is important to

_______    a. Microscope use         b. Protein structure        c. Actin & myosin         d. Molecule types
                                                        e. Selling tickets in big places

        8. The defining feature of an unsaturated lipid would be

_______    a. It’s hydrophobic         b. It’s hydrophilic        c. It’s polar         d. It has double bonds
                                                            e. It’s not, um, saturated

        9. Water’s surface tension is most connected to

_______    a. Cohesion         b. Adhesion         c. Heat stability        d. Evaporation         e. How stressed it’s feeling

        10. Which bonds are least likely to show up in molecules inside cells?

_______    a. Covalent         b. Ionic         c. Hydrogen        d. Double         e. Savings?

        11. Which is most likely to involve hydrolysis?

_______    a. Making a protein            b. Dissolving a salt            c. Digesting a starch
                d. Moving molecules through a membrane            e. Isn’t that, like, illegal or something -?

        12. Which process / product in living things is always (not just usually) done by / with proteins?

_______    a. Structure         b. Movement         c. Hormones        d. Energy supply         e. Annoying the students


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 different uses that plants have for starches that humans can digest?


2. Give the base sequence for the other strand of DNA -
 A   A   C   T   C   G   A   T   A   C   T   G


3. What are two things in non-coding DNA that are actually types of codes?


4. What are the two basic component molecules of a lipid?


5. What are two elements in the air that naturally exist as multiple-bonded molecules?


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

  __________          ___________          ______________                _____________

7. What are two sets of differences (other than name/initials) between DNA and RNA?



8. What happens when an atom or molecule gets reduced?

9. Show the basic chemical reaction of photosynthesis. You can use chemical symbols or chemical names.

10. What feature makes a molecule a polymer?

11. If genes code only for proteins, how do cells make other kinds of molecules?

12. Briefly describe what happens to the water molecules as the temperature -
4O C (40O F)

13. What is a hydration shell?

14. In chemistry, what makes a molecule organic?


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.  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

2.  Give four rules from the Cell Theory.



3.  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

4. What are four different types of communication-type proteins?



5.  For the pH scale shown below, fill in the proper blanks -
            2   3   4   5   6   7   8   9   10   11   12   13
Name         _____________         ____________             _________________
Ion           _______________                                          _________________

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





7. Give two different uses in living things for each -



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.

There have been a few examples of chemistry terms that were originally named after the element doing them, the found later to be a more general process, done by some other elements as well. For Three Points Each, what are they?

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

What is a material’s temperature really a measurement of? Three Points.

What is particularly good for lakes when they turn over? Three Points.

Where did the numbers of the pH scale come from? Three Points.

In photosynthesis, what does the light energy get mostly converted into? Three Points.

Why exactly does the Benedict’s test require heat? Three Points.

Why is it important for toxins to be lipid-soluble? Three Points.

What type of molecule are scientists running out of abbreviations for? Three Points.

If a flu vaccine isn’t completely effective, what did the developers do wrong? Three Points.

What happens if a living thing is just placed as-is into an electron microscope? Three Points.


SCI 135 

Michael McDarby


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Reconstituted and uploaded Sep 9 2021 7:14AM