BI 171 - Fourth Exam - 2004

Multiple Choice.

Place the letter of the choice that best answers the question on the line to the left.
Two Points Each. NOTE: "e" answers are never the correct answer.

Links in numbers go to relevant sections of the book.  Some details were only covered in class.


_______ 1. A major step in both photosynthesis and respiration is

                        a. Glycolysis                                                   b. Conversion of light frequencies
                        c. The electron transport chain                         d. Calvin cycle
                                            e. The step where I forgot their steps


_______ 2. C4 photosynthesis is found in

                        a. All land plants             b. Desert plants             c. All aquatic plants
                        d. Deep-living algae                     e. The plants that were 4th in line


_______ 3. An acrosome would be found in a

                        a. Sperm                     b. Chloroplast                         c. Mitochondrion
                        d. Blastula                                     e. Fairly decent dictionary


_______ 4. Steroid hormones get into cells because the steroid molecules

                        a. Are quite small                                  b. Use existing pores in the membrane
                        c. Use a variety of carriers                     d. Are lipid-soluble
                                                e. Are very pumped-up and scary


_______5. Why has Caenorhabditis elegans been so useful as a research animal?

                        a. Itís closely related to us
                        b. An adult always has a particular number of cells
                        c. Its large size makes analysis easy
                        d. All of these make it useful
                        e. Itís name frightens the common folk


_______6. Which is true of all consumers, compared to all producers?

                        a. They have more species and more total biomass
                        b. They have more species but less total biomass
                        c. They have fewer species but more total biomass
                        d. They have fewer species but less total biomass
                        e. Theyíve run up more credit-card debt


_______7. The nervous system is a product of

                        a. Ectoderm                     b. Endoderm                     c. Neuroderm
                        d. Mesoderm                                     e. Brainoderm


_______8. Group transfer potential is at work during

                        a. Diffusion                     b. Crossing over                 c. Reradiation
                        d. Phosphorylation                     e. Certain team-based reality programs


_______9. The two main electron-carrying coenzymes are associated with

                        a. Dietary minerals                   b. B vitamins                    c. Pigments
                        d. Protein intake                            e. A bunch a molecules-of-ill-repute


_______10. A genome includes

                        a. All of the genes, only                                 b. All of the DNA
                        c. All DNA plus active RNA                          d. DNA, RNA, and proteins
                                        e. The kitchen sink and a bag of chips


_______11. Ammonia results from

                        a. Digestion of proteins                                 b. Digestion of lipids
                        c. Respiration of proteins                              d. Respiration of lipids
                                e. Some big bald ambiguous guy putting it in a bottle


_______12. Decomposers are

                        a. Neither consumers nor producers
                        b. Sometimes consumers, sometimes producers
                        c. A special type of producer
                        d. A special type of consumer
                        e. Involved in bad jokes involving Jamaicans


_______13. Feedback control over biological systems is usually

                        a. Negative                         b. Positive                     c. Alternating
                        d. Mediated                                 e. Bad if youíre on a diet


_______14. Which procedure uses radioactively-tagged RNA molecules?

                        a. Protein electrophoresis                     b. DNA electrophoresis
                        c. Southern blot                                  d. Mass spectroscopy
                            e. Cells that are kept in the dish with a "magic fence"


_______15. Since NAD picks up electrons and transports them away, it is

                        a. An oxidizing agent                             b. A reducing agent
                        c. Electromagnetic                                d. A reaction center
                                e. Often being watched by the authorities


_______16. Coenzyme A (coA) is an important player in

                        a. Transduction pathways                         b. Photosynthesis
                        c. Meiosis                                                d. Aerobic respiration
                                                e. Any alphabetical process


_______17. An antenna complex is mostly made up of

                        a. Muscle tissue                 b. Chlorophyll                 c. Polar bodies
                        d. Minerals                                 e. Ex-radio personalities


_______18. A polar body is

                        a. Where the spindle originates
                        b. Where the spindle connects
                        c. A haploid cell produced during meiosis
                        d. A diploid cell produced during meiosis
                        e. Always popular during the holidays


Short Answer.

Pick NINE questions to answer in the spaces provided.
: if you answer MORE than nine, only the first nine will be corrected.
Four Points each. Partial credit is possible.

1. What are the first two steps to glycolysis?


2. Give two different examples of signal ligands.


3. Briefly describe what happens in the two ways that polyspermy is prevented.



4. What is the biological function of oxaloacetate?



5. What gradually happens to all of the energy that works its way up a food chain?



6. What are two different classes of tissue functions that would be found in both animals and plants?


7. At what point does it stop being an embryo and become a fetus?



8. Briefly explain where and under what circumstances oxygen debt occurs.



9. What are two different reasons why animals use metamorphosis as part of their life cycles?


10. Electrophoresis separates proteins based upon which two overall features?


11. What are two different uses plants have for carotenoids?


12. What are two different features that should be strongly influenced by homeogenes?


13. What two processes factor most into growth of multicellular organisms?

14. For some sort of taxis found in organisms, give an example, and the general type of taxis it is, including whether it is positive or negative.


Taxis type-

15. What happens during contact inhibition?




Long Answer.

Select and answer completely any four of the following questions.
if you answer more than four, only the first four will be corrected.
Seven Points Each. Partial credit is possible.

1. Briefly describe four different ways that anaerobic organisms impact human beings.





2. What are four different things that happen during meiosis that donít happen during mitosis?





3. Give the cycle of steps that are done, over and over, in the polymerase chain reaction.






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

         Shorter Wavelength                 \       Visible Range      /               Longer Wavelength
                   *                               *   /   *        *               *   \        *


5. Give three sets of differences (be careful - donít use the same one twice but reworded!) -









6. For the two main parts of photosynthesis reactions:


What gets Used?

(Materials and/or Energy)

What Gets Produced?

(Materials and/or Energy)






7. What molecules (in order! -the boxes are numbered!) are involved in the typical transduction pathway? 1.
2. 3.
4. 5.
8. Answer for respiration -
Most common fuel -
Step done by ALL organisms -
Materials that can act as terminal electron acceptors -


Link for Answer Key


Answer as many or as few as you wish. You can't lose points on the rest of the exam by getting these wrong. Partial credit is possible.

How is crossing over used to map genes on chromosomes? Four Points.


What advantage is there to being both male and female but not self-fertilizing? Four Points.


How does life on Earth "break" the Second Law of Thermodynamics? Four Points.


Why are lipid molecules so full of calories? Four Points.


Why, according to theory, is it important that only the sperm nucleus gets into the egg cell? Four Points.


Of the two "trunks" of animal groups, there is only one that shares our side. Which group is it? You can answer it with a typical "member." Three Points.



What is Sturgeonís Law? Three Points.



Restriction enzymes occur naturally in bacteria. What is their natural function? Three Points.



What was the specialty of the researcher responsible for the Polymerase Chain Reaction? Three Points.






BI 171



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