SC 135 - Third Exam Spring 2011


Links connect to relevant parts of the online book.




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.   What structures pretty much have to work together?


_______                a.  Nucleus and cell membrane                b.  Chloroplast and contractile vacuole                c.  Lysosome and food vacuole

d.  Ribosome and peroxisome                                    e.  The ones that signed the contracts they didn=t read




2.   Chromatin is made up of


_______                a.  DNA and RNA                             b.  DNA and membrane                        c.  Membrane and protein

                             d.  DNA and protein                                        e.  Sounds like a pretty metal box - for candy?




3.   Disease-causing prions are


_______                a.  Viruses                              b. Infective protein molecules                    c.   Bacteria

                            d. Bacterial plasmids                            e.  Probably a bad name for a new snack food





4.    Two genes on the same chromosome are said to be


_______                a.   Homologous                    b.  Shared                               c.  Linked                    d.  Sisters                     e.  Cheap bums





5.   Which type of mutation shifts the Areading frame@?


_______                a.  Addition               b.  Polyploidy                       c.  Substitution                d.  Redundancy        

                                                                    e.  Ones you get from reading with a Kindle





6.   A mathematical relationship is used to explain why there seems to be a size limit to cells.  The relationship is about


_______                a.  DNA length and nucleus size                b.  Cell volume and surface area                c.  How many different organelles there are

          d.  The smallest multicelled systems                            e.  It=s math, so I thought we were going to ignore it



7.    Chaperonins are used

_______                a.  To proofread DNA copying                                                b.  To proofread DNA transcription to RNA

c.  To check amino acid sequences                                          d.  To get proteins to form the right shapes

                                    e.  When cells hold proms in teensy gymnasiums





8.   A karyotype is found by examining


_______                a.  Cell organelles                     b.  DNA sequences                   c.  Cell types                d.  Chromosome groups

                                                                                              e.  Who Kary hits on





9.  Apoptosis would result in a cell


_______                  a.  Losing a chromosome                b.  Gaining a chromosome                c.  Dying                    d.  Eating food

                                                                                                   e.  Giggling





10.   Different alleles would have to have different


_______                a.  Functions              b.  Nucleotide sequences                c.  Proteins                d.  Amino acid sequences               e.  ID cards





11.   Which would not be enclosed in its own membrane?

_______                a.  Nucleolus             b.  Mitochondrion                c.  Peroxisome                    d.  Golgi body

                                                                       e.  Does it have to have the receipt?





                     12.   Which is true about gametes?


_______                a.  They are produced by mitosis            b.  Even organisms without genders have them                c.  They are haploid

d.  All of the above are true                                e.  They are a word I recognize...sort of...





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.   How can you use concentration levels to recognize that movement through a membrane is active transport?



2.   Draw a double-stranded chromosome, and label two different parts.


3.   What are two different functions performed by proteins embedded in cell membranes?


4.    What are two organelles found in both prokaryotes and eukaryotes?


5.   Which two high-funding research areas are interested in telomeres?



6.   Describe or draw and label the hydrophobic and hydrophilic layers in a typical cell membrane.





7.    What are histones?



8.   For a low chromosome number, compared to a high one -





9.   The presence of golgi bodies indicates that a cell is doing what function?




10.   What two functions are commonly found in surfaces covered with microvilli?


11.   Position effects -





do they


12.    Two chromosomes are labeled as homologous - what does that mean?



13.   What two different sorts of Abits@ make up the non-coding part of a chromosome?



14.    Briefly explain how root pressure moves water into and up a plant.




15.   What are two different structures that can make up cytoskeleton?


16.   What is polyploidy?






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.   Give 3 sets of differences between -






2a.   Briefly explain the endosymbiont theory.



2b.  What two structures are associated with the endosymbiont theory?



3.   Give three sets of differences, other than the genders involved, between







4.   Given here is one side (strand) of DNA.  Starting with this strand, and using the table, show:


Starting   ______________________________________________________________________________

Strand        T  A  C  A  C  G  C  G  T  G  C  A  T   C  G  C  T  T  G  G  A  A  T  C 




                                                         Messenger  RNA from 1st strand




                                                                Amino Acid Sequence      

5.   What are the four statements of the Cell Theory?




6.   Give three sets of differences between -






7.   What are three different ways that fresh-water organisms protect themselves from osmosis damage?





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.


What parts of cell theory were not in the original version, but were added later?  Three Points Each.



Which Kingdom does not have cell walls (Two Points), and why don=t they (Three Points)?




Briefly, what bad thing can result from giving antibiotics to people that are known to have virus diseases?  Three Points.




What normal cell functions can go wrong to make cells become cancer?  Three Points each.




What is the purpose, exactly, of pollen?  Three Points.




What is a Barr body?  Three Points.




In which Kingdom is sexual reproduction without male and female common?  Three Points.



Why does active HIV tend to produce lots of mutants?  Three Points.




What disease is caused by prions?  Three Points.








Michael McDarby.

SC 135

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