BIO 171  - Third Exam  - 2014

Each question's number is linked to the relevant part of the online book, if possible (some questions relate to multiple sections). 


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.    What makes rough endoplasmic reticulum “rough”?

                        a.  DNA                          b.  Cell walls                       c.  Ribosomes

                        d.  Microfilaments            e.  It grew up in a bad neighborhood




_______  2.  C. elegans has been an important source of information about

                        a.  Plant processes                   b.  Genetic basics

                        c.  Human health                     d.  Developmental processes

                                                e.  How to dress nice




_______ 3.    Apoptosis would result in a cell being

                        a.  Mobile with pseudopods                            b.  Differentiated

                        c.  Dead                                                        d.  Prepped for division            

                                                e.  A new Daddy?




_______ 4.    A cell plate first appears as

                        a.  Golgi vesicles                                 b.  Microtubules

                        c.  Microfilaments                               d.  Endoplasmic reticulum

                                    e.   More inexpensive dinnerware




_______ 5.    Telomerase would be least active in cells under which condition?

                        a.  Sex cell formation                             b.  Embryonic development

                        c.  Cancer growth                                   d.  Old age

                        e.  Is that what they sing in the background of “The Lion Sleeps Tonight”?




_______ 6.   During which stage(s) of the cell cycle would cytokinesis definitely not happen?

                        a.  Interphase only                               b.  Prophase and metaphase

                        c.  Metaphase and anaphase                d.  Anaphase and telophase

                        e.  Well, you can’t do it when someone is looking…


_______ 7.    Malignant cancer cells have activated genes that make

                        a.   Golgi bodies                      b.  Spindle fibers                     c.  Pseudopods

                        d.   Mitochondria                    e.  Very bad decisions for you




_______ 8.    Microvilli would aid a cell involved in

                        a.  Mobility                                      b.  Reproduction

                        c.  Absorption                                  d.  Disease resistance

                                    e.  Shady business dealings




_______ 9.    Sperm are able to find an egg cell through

                        a.  2nd messenger molecules                     b.  Negative chemotaxis

                        c.  Osmotic pressure differences               d.  Positive chemotaxis

                                                e.  Ads on Craigslist




_______ 10.    Sectioning refers to

                        a.  Organelle subdivisions                               b.  Specimen preparation

                        c.  How mitotic stages change                        d.  Embryonic development

                                                            e.  Buying concert tickets




_______ 11.   Nervous systems develop from

                        a.  Mesoderm                          b.  Endoderm                          c.  Ectoderm

                        d.  Dendroderm                      e.  Dermaderm…aderm…aderm…




_______ 12.   Storage and processing of RNA is done specifically in the

                        a.  Nucleolus                                       b.  Golgi bodies

                        c.  Nuclear envelope                            d.  MTOC

                                    e.  Back of a “service station” on 58th street


_______ 13.  When a freshwater plant moves phosphate from the low-concentration area
                                    of the pond into the higher-concentration area of the cytoplasm, that is

                        a.  Synthesis                           b.  Exocytosis              c.  Active transport

                        d. Passive transport                 e.  Probably going to get someone in trouble





_______ 14.   A mutation that made eyes grow all over fruit flies proved to be a mutation in

                        a.  A HOX gene                                  b.  A microtubule pathway

                        c.  A G protein gene                            d.  A microfilament pathway

                                    e.  The new fils It’s Always Looking at You!!!




_______ 15.   Directed motion of materials in a cell can be done with

                        a.  Ribosomes and microfilaments

                        b.  Mitochondria and microtubules

                        c.  Vesicles and ribosomes

                        d.  Microtubules and endoplasmic reticulum

                        e.  Wires and teeny drones




_______ 16.   Some plants hit a size limit based on the relationship between

                        a.  Turgor pressure and root pressure

                        b.  Root pressure and gravity

                        c.  Size and volume

                        d.  Flux and counterflux

                        e.  How they look and how they think they look




_______ 17.   Okazaki fragments are a feature of

                        a.  Spindle breakdown                                                b.  Unequal crossing over

                        c.  DNA replication                                         d.  Transduction message splits

                                                e.  Very fast sushi preparation




_______ 18.   Which makes sense for an individual in a monoecious species?

                        a.  Both male and female parts

                        b.  Only able to do either asexual or sexual reproduction

                        c.  Only able to do asexual reproduction

                        d.  Shows no particular gender

                        e.  No one wants to Friend them


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.   For dynein and kinesin -

How are

they the


How are



2.   What two major but totally different functions occur during interphase?

3.    What are two different enzymes involved in DNA replication?

4.    Viruses violate some of the rules of the Cell Theory.  What are two such violations?

5.    Briefly explain,  for the fluid mosaic model of cell membranes -



fluid -


it’s a

mosaic -

6.   What is the 9+2 arrangement?




7.   Briefly explain how an individual winds up with extra copies of a few genes.





8.   What are two strong pieces of evidence that support the endosymbiosis theory?


9.    What typically happens in a positive feedback loop?




10.  What are two different ways that organisms can prevent damage from exposure to the hypotonic conditions of fresh water ecosystems?


11.  What are two different ways by which polyspermy is prevented?

12.  The most commonly-presented explanation for why cells seem to have maximum size limits deals with the mathematical relationship between what two aspects of a cell?


13.  What is the “pull strength” rule for spindle fibers?




14.  How is the developmental potential different between cells made by -







15.   Give two different broad classes of signal ligands.


16.  What and where is glycocalex?




17.  What are two different Kingdoms that have cell walls as a definitive feature?


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.   For the two basic types of cells, give the type and two sets of differences between them -


2.    Fill in the steps of transduction between the listed steps.
Receptor picks up ligand.    ---->


Proper enzyme starts to work. 

3.   Give the functions (names are NOT enough) of three different membrane protein types.

4.   For two different types of vesicles or vacuoles -
Structure NAME Structure FUNCTION


5.   Give three sets of differences (other than the associated genders) between -



6.   Briefly describe four ways that flux can be increased through a barrier.



7.   For each category of microscope, there are two different terms that apply.
of the
Imaging Beam

How the Beam

Interacts with



8.   Give the name and function of three different types of plant tissues.





Link to 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 resolution measured?  (Not looking for units here) Three Points.



Where are giant amebas found?  Three Points.



How are plasmids associated with doctors not giving antibiotics to folks with viral infections?  Three Points.



Why do evolutionary researchers prefer to use mitochondrial DNA rather than nuclear DNA?  Three Points.



To what materials is the Earth a permeable barrier?  Three Points.



As diffusion moves toward equilibrium, the progress gets slower and slower.  Why?  Three Points.




What well-known cell structure apparently has no accepted name?  Three Points




What is probably true of organisms that have no response to destructive polyspermy?  Three Points.





What is the “dirty little secret” of stem cell research?  Three Points.








BI 171



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