SCI 135 - Second Exam Spring 2019


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. 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 -?

        2. Steroid hormones are in the same molecule class with

_______    a. Corn starch         b. Olive oil         c. Egg white protein        d. Milk sugar
                                        e. The other pumped-up molecules

        3. Molecules in cells almost never have

_______    a. Single covalent bonds         b. Multiple covalent bonds        c. Hydrogen bonds         d. Ionic bonds
                                                                    e. Their own Instagram accounts

        4. Which should contain amino acids?

_______    a. Cellulose         b. Unused cooking oil         c. Kinase        d. Any type of acid         e. Is that Italian?

        5. The fluid mosaic model is an explanation for

_______    a. Membrane structure         b. DNA code-to-protein        c. Cell wall structure         d. Microscope beam projection
                                                                        e. Umm, something wet-?

        6. Compared with a solution of pH 12, one of pH 11 is

_______    a. Twice as basic         b. Half as basic        c. Ten times more basic         d. Ten times less basic
                                                        e. Given a different number

        7. Which is a direct measurement of ability to focus clearly?

_______    a. Focality         b. Resolution        c. Intensity         d. Magnification        e. “No, that’s a bit fuzzy…”

        8. The only Kingdom to not have cell walls:

_______    a. Animalia         b. Protista         c. Fungi        d. Monera         e. Nonwallia

        9. The organization of periodic table columns is based upon

_______    a. Protons         b. Neutrons         c. Electrons        d. Molecules         e. Eeeny, meeny, miney, moe...

        10. In a cup of coffee, caffeine would be a

_______    a. Soltation         b. Solvent         c. Solution        d. Solute         e. Lemme guess, it starts with “sol”

        11. When water ionizes, it goes from a form where all of the atoms are uncharged
                                to a release of H+ and OH-, meaning

_______    a. The H reduces and the OH oxidizes         b. The OH reduces and the H oxidizes
                c. Both reduce                                            d. Both oxidize
                                        e. I’m never drinking water again.

        12. Lipids are generally

_______    a. Basic         b. Hydrophilic         c. Hydrophobic        d. All of these         e. In a bad mood.


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. Briefly explain what a hydration shell is.

2. What are two different types of uses for proteins?


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

     __________        ___________              ______________             _____________

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


5. What are the components or “pieces” of lipid molecules?


6. What would an unsaturated molecule have that a saturated version of the "same" molecule would not?

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



8. Briefly explain why the density of water gets lower below 4o C.

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


10. What makes something a polymer?

11. Briefly explain why the evaporation of a liquid is a cooling process.

12. What are two different functions done by lipids in living things?


13. What is sectioning in the lab?

14. What are the functions of each of the two ends of an antibody molecule?


15. Draw the layers of a cell membrane. LABEL – outside of cell, inside of cell, hydrophobic layer, hydrophilic layer. Some labels may need to be used twice.


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





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.  Draw bonds yourself (include some doubles) and practice.
O           O           O

          O              O           O           O
                    O                                       O           O
          O               O

4. For the two basic types of carbohydrates -

5.  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

6. What are four different types of proteins that can be embedded in a cell membrane?



7. Give three sets of differences between -




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.

Give a reason why there is so much N2 gas in the atmosphere. Three Points.

What causes local ponds to “turn over”? Three Points.

What does the term pH actually stand for? Don’t define it, explain why it’s called “pH.” Three Points.

Proteins unwind in stomach acid. What exactly is the acid doing to make that happen? Three Points.

What are the two regional patterns often found inside protein molecules? Three Points Each.

For Three Points each, what atomic-level materials have been connected to aging damage? Three Points Each.

How is resolution officially measured? Three Points.

What kind of microscope only produces black-and-white images? Three Points.

What’s wrong with the math-based explanation for cell size limits? Three Points.

Why are a lot of technical biological terms just regular English words? Three Points.



SCI 135 

Michael McDarby

Reconstituted and uploaded Sep 9 2021 850AM

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