SC 135 - Fourth Exam 2009


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.  Oxygen debt happens in

_______ a. Plant cells when there's no light                b. Muscle cells that need more oxygen than they can get                c. Lung cells, in order to move oxygen
              d. Water when oxygen levels drop                                    e. Future banks - you won't want to default on their loans!

                2.  Most of the ATP output of aerobic respiration happens in

_______ a. The electron transport chain             b. Glycolysis            c. Krebs cycle             d. Cellulysis            e. A little ATP machine

                3. The "Snowball Period" changed life on Earth by

_______ a. Bringing in water             b. Concentrating primordial soup            c. Increasing competition             d. Stopping chemosynthesis
                                                                            e. Making it all about winter funtime

                4.  Modern versions of Darwin's evolution theories see changes over time in

_______ a. Species features             b. Individual fitness            c. Kingdoms             d. Gene pools            e. The level of craziness in the "counter" theories

                5.  Vitamins are a type of

_______ a. Mineral                 b. Cofactor                 c. Coenzyme                d. Carbohydrate                 e. Health scam

                6.  The Laws of Thermodynamics apply to

_______ a. Nutritional content of food            b. Movement of energy in a food chain            c. Enzyme efficiency            d. Photosynthesis in low light
                                                                                    e. The hotness of your gorgeousity, Baby!

                7.  During the Cambrian Explosion,

_______ a. All major animal groups appear in the fossils                                      b. 95% of all species at that time went extinct
              c. The moon was produced by a major collision                                    d. Plants colonized land ecosystems
                                                                    e. Somebody's Cambrian blew up

                8.  The famous "plant problem" involves

_______ a. Food chains             b. Environmental toxins            c. Beginnings of Life             d. The nature of sunlight
                                                    e. They're going to rise up and choke us in our sleep

                9. What's the proper order?

_______ a. Aerobic respiration, photosynthesis, prokaryotes, eukaryotes                b. Prokaryotes, photosynthesis, aerobic respiration, eukaryotes
              c. Prokaryotes, eukaryotes, aerobic respiration, photosynthesis                d. Prokaryotes, eukaryotes, photosynthesis, aerobic respiration
                                                                        e. Eenyotes, meeneyotes, mineyotes, moteyotes....

                10.  In chemosynthesis, the environmental energy type is usually

_______ a. Light                 b. Lightning                 c. Ultraviolet                d. Heat                 e. Red Bull

                11.  Reradiation happens in materials when

_______ a. Electrons jump outward             b. Electrons jump inward            c. They break down             d. They combine chemically
                                                            e. They don't like the radiation they got for Christmas

                12.  Which works by lowering activation energy?

_______ a. Photosynthesis             b. Respiration            c. Enzymes             d. Entropy            e. I'm just lowering expectations for my mark...


Answer any eight of the following questions for 4 Points Each.
if you answer more than eight, only the first eight will be corrected.
You can get partial credit on these answers.

1.  Show the basic overall process of aerobic respiration. Include all reactants, products, and energy uses.


2.  Show the basic overall process of photosynthesis. Include all reactants, products, and energy uses.


3.  Give the normal progression (very generalized) of organisms in a food chain.

4.  In general, what are coupled in coupled reactions?

5.  When ATP is broken down for energy, what are the two products?

6.   What are the two major uses plants have for glucose?

7.   RNA might have led to our "modern" cell chemistry because it can do some things like proteins and DNA...
Like proteins,
it can -


Like DNA,
it can -
8.  Where, exactly, do nitrogenous wastes come from?

9.  A mutation probably combined which two systems in the evolution of photosynthesis?

10.  What are the two major different uses plants have for carotenoids?

11.   Explain why the feature produced by a metabolic pathway has to be a multiple-gene trait.


12.  What is panspermia?


13.   Why, exactly, can a change in pH affect how well enzymes behave?


14.  Two features the very first "living systems" had to have:

15.  Two features the first "modern" living systems had to have:


Answer any four of the following questions for Eight Points Each.
if you answer more than four, only the first four will be corrected.
You can get partial credit on these answers.

1.  What are four different ways that anaerobic organisms impact humans?

2.  Briefly describe the three different ways that enzyme inhibition can work.




3.  For the main photosynthesis reactions:

Name: Materials or Energy Used Materials Produced

4.  Answer the questions on the graph for the relationship between enzyme activity and temperature. A. Why is the rate dropping off here? B. What is this point called? C. Why is the rate rising here?

                                                                  *                *
                                                              *                        *
Reaction                                      C    *                             *   A
Rate                                                 *                                   * 
                                                      *                                         *
                                                  *                                                    *
                                         *                                                                       *
                          *****                                                                                         ******
                                                                     Increasing Temperature  �> 


5.  Plants have nutrient needs besides the materials directly needed for photosynthesis. Give two different nutrients they need, and for each, tell how the plants use that nutrient.

6.  At the points labeled with the stars, attach the appropriate labels from this list:   Violet. X-Ray. InfraRed. Red. Blue. Ultraviolet.

           High Frequency      \           Visible Range             /        Low Frequency             
                  *                       *    /    *          *                       *      \    *


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.

Irreversible enzyme inhibition is often produced by what sorts of secretions? Three Points.

How does the sweetener Splenda relate to the term specificity? Three Points.

When geologists dove to investigate hydrothermal vents, what discovery there took them totally by surprise? Three Points.

What do animals that produce uric acid have in common that connects to that particular feature? Three Points.

What sorts of atoms (which element) are critical in moving electrons around? Three Points.

What type of abnormal cells can go into oxygen debt? Three Points.

What color flowers can a typical bee not pick out from the background? Three Points

What mineral can greatly increase algae growth in the open ocean? Three Points.

What was the first indication that there had been a Snowball Period? Three Points.

Life on land probably came from organisms that were already adapted to which watery ecosystems? Three Points Each.




Michael McDarby.

SC 135

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