BI 171 - Third Exam - 1999

NOTE - the numbers link to related information in the book.  Not all information on old exams is in the new book (so some numbers have no link), and if something looks unfamiliar, you can check to see if it's from a chapter you're supposed to be studying for your current exam.

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.


_______ 1. When sugar moves from the blood, where it's at a .003% concentration, into 
                               liver cells, where the concentration is .009%, it moves by
                        a. Diffusion                 b. Osmosis                 c. Respiration
                       d. Active transport                     e. U-HaulTM


_______ 2. A freeze-fracture technique can be used to investigate
                        a. Diffusion rates         b. Membrane structure         c. Photosynthesis
                        d. Respiration                         e. Skiing accidents


_______ 3. Glycoproteins are commonly used as
                        a. Cell markers                           b. Respiratory metabolites
                        c. Thykaloid membranes             d. Hydrogen acceptors
                                                          e. Ashtrays


_______ 4. Which should have both hydrophilic and hydrophobic regions?
                       a. Saturated fat                                 b. Unsaturated fat
                       c. Transmembrane protein               d. Glycolysis enzymes
                                        e. Psychology summer camps


_______5. Anabolism is a metabolic pathway that could also be called
                       a. Active transport             b. Breakdown             c. Passive transport
                       d. Synthesis                                     e. Ferdinand


_______ 6. NAD+ and FAD move hydrogens around. Why, usually?
                       a. Because they are just as good as phosphate groups
                       b. To change cellular pH
                       c. It's the hydrogens that capture and convert light energy
                       d. As a way to transfer electrons
                       e. They're bored, and have nothing else to do


_______ 7. In virtually every energy conversion, some of the energy
                        a. Disappears                 b. Is used                 c. Becomes heat
                        d. Is stored in bonds                 e. Isn't really trying its best


_______8. Monomers, component molecules from broken down food polymers, can 
                               be used for
                       a. Only building new polymers
                       b. Only respiratory purposes
                       c. Both building polymers and respiratory purposes
                       d. Cell markers
                       e. Only a month before you have to pay for them


_______9. What sort of exchanges are possible for a defined closed system?
                       a. Energy only             b. Matter only             c. None
                       d. Any, as long as they're equal             e. Store credit only


_______10. The Krebs Cycle occurs in the
                       a. Chloroplasts                 b. Cytoplasm                 c. Mitochondria
                       d. Nucleus                             e. Newest model washing machines


_______11. In the reaction NAD+ + H2 -> NADH + H+ , the NAD+ is being
                       a. Oxidized                 b. Reduced                 c. Metabolized
                        d. Respirated                     e. Made to play the fool


_______12. By far the most ATP is produced by
                       a. Electron Transport System                 b. Krebs Cycle
                       c. Glycolysis                                          d. Fermentation
                                            e. The Alphabet Store


_______13. Oxygen debt occurs in
                        a. All plant cells             b. All animal cells             c. Nerve cells only
                        d. Muscle cells only                 e. Banks you should avoid


_______14. The total internal kinetic energy of a system is also known as its
                       a. Metabolism                 b. Potential                 c. Oxidation state
                       d. Heat                                     e. Minimum asking price


_______15. ATP is a very useful molecule due to its
                        a. Electrical potential                        b. Oxidation potential
                       c. Group transfer potential                 d. Reduction potential
                                            e. It's potential for confusion


_______16. Stronger, more stable bonds are
                        a. At a lower energy state and take more energy to break
                       b. At a higher energy state and take more energy to break
                       c. At a lower energy state and take less energy to break
                       d. At a higher energy state and take less energy to break
                       e. Medium, it's all medium


_______17. In a situation like we had in the lab, for a freshwater plant in aquarium water,
                       a. The osmolarity of the cell is higher than the osmolarity of the water
                       b. The osmolarity of the cell is lower than the osmolarity of the water
                       c. The osmolarity in both areas is equal
                       d. Only the water has osmolarity
                       e. This class has a lab-?


_______18. Which is commonly true?
                       a. NAD+ is a prosthetic group and FAD is a coenzyme
                       b. FAD is a prosthetic group and NAD+ is a coenzyme
                       c. Both NAD+ and FAD are coenzymes
                       d. Both NAD+ and FAD are prosthetic groups
                       e. All of these choices are making me dizzy



Short Answer.  

Pick NINE questions to answer in the spaces provided.
NOTE: if you answer MORE than nine, only the first nine will be corrected.

Four Points each. Partial credit is possible.

1. Write the basic reaction for respiration (it doesn't have to be balanced).




2. What are the typical components of lipid molecule, and how many of each component are there?




3. Briefly explain how a partition coefficient is determined.





4. What are the four fundamental forces of the universe?



5. What is the actual function of oxygen in aerobic respiration?





6. Just about all of the energy in living systems can be traced back to what ultimate source?




7. In general, energy is measured using which two unit types?





8. Briefly explain the implication of the equation E = mc2. (Just explaining the terms won't be enough)




9.  What are two examples of molecules that can move freely through a typical cell membrane?




10. Name the two types of coupled reactions.





11. What are two different types of examples of human-impact products dependent upon the activity of anaerobic respirating organisms?




12. What are two processes or structures used by organisms to resist osmotic pressure?





 13. What are two processes or structures used by organisms to exploit osmotic pressure?





14. ATP synthase gets much of its "power" from the movement of which particles?





15.  What are two factors that can make a cell membrane more fluid?





16.  What does a saturated lipid molecule have that an unsaturated molecule wouldn't?





Long Answer.  

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


1. Name and give the basic method of operation for three different types of transport proteins.






2. The rate at which a flux through a membrane reaches equilibrium depends upon four factors. Name three, and for each tell how a particular change in the factor affects the rate.




3. For the two main parts of photosynthesis:

NAME TAKES IN (substrates and/or energy) PRODUCES (substrates and/or energy)



4. What are three different types of processes that can be accomplished with the "aid" of phosphorylation (including from ATP)?







5. Fill in for the Laws of Thermodynamics:
COMMON NAME: DEFINITION:
1ST
2ND

6. Glycolysis is a ten step process. Briefly describe six steps, in proper order (you can skip steps, but don't rearrange them).







7. For a typical forest food chain, fill in the major steps (these are very general designations) in order, give an example of an organism at that level, and check off for P(hotosynthesis) and/or R(espiration) for that level as well.
General Designation Example from forest P R


Link to Answer Key

BONUS QUESTIONS. 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.

Of the four fundamental forces known, the connection among three is understood. Which force is not definable using terms from the others? Three Points.




Which systems in the body depend upon electrical potential to work? Three Points each.




Where have entire ecosystems been found recently where none were expected? Three Points each.




a) What sort of building entrances are carrier proteins often compared to? Three Points.




b) What is a better analogy for carrier proteins? Three Points.




c) Why don't carrier proteins act like the a) analogy? Three Points.




There are two basic factors about metabolic wastes that affect what sort are actually produced. For Three Points each, what are they?




When excess sugar in the body is converted into fat components, why are the components always a string of an even number of Carbons? Three Points.




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