BI 171 - Fourth Exam - 2001

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. Histones are important in
                    a. Cell division                                 b. Chromatin structure
                    c. Microtubule formation                  d. Spindle connection
                                e. Producing certain weird types of music

_______ 3. Prokaryotes assure that newly-formed cells get the right chromosome copies  
                            by using
                    a. Spindle fibers at the poles                 b. Linked ribosomes
                    c. Links between the new cells              d. Attachment points on the membrane
                            e. A entire squad of specially-trained inheritance lawyers

_______ 4. Protein signal regions determine
                    a. Which receptors they connect to             b. Destination within a cell
                    c. Whether an enzyme is active                   d. External cell marker types
                                                e. Which blinker is blinking

_______ 5. Which is true about dominant alleles, when compared to recessive alleles?
                    a. Offspring are more likely to inherit them and more likely to show their effects
                    b. They are usually connected by linkage
                    c. They are more likely to show up in one gender
                    d. They are more likely to produce a functioning protein
                    e. They are not as fond of fudge

_______6. Watson and Crick's description of the double-helix structure of DNA was
                            important primarily because it explained how DNA could
                    a. Be mutated
                    b. Be wound up into chromosome structures
                    c. Hold a variety of information
                    d. Be structured around a carbohydrate base
                    e. Made into a delicious cotton-candy treat

_______ 7. Actin and myosin are involved in
                    a. Flagella spinning                                     b. Muscle contraction
                    c. DNA transcription                                  d. Photosynthesis
                    e. A scandalous affair just reported in the National Enquirer

_______8. Which term is used to refer to proteins that are used virtually all the time in a cell?
                    a. Regulatory                 b. Homeostasis                 c. Homologous
                    d. Housekeeping                                 e. Annoying

_______ 9. Which best describes plasmids?
                    a. Extra genes                                         b. Extra chromosomes
                    c. Energy producers                                d. Used for secretion
                        e. Yet another term that I recognize but don't remember...

_______10. Commonly, eukaryote gene transfer uses what delivery method?
                    a. Plasmids                     b. Injection                 c. Acids
                    d. Viruses                                 e. Federal Express

_______11. Which would be an example of chemotaxis?
                    a. A person finding the source of a smell
                    b. A plant absorbing nutrients from fertilizer
                    c. Chlorophyll moving from a ribosome into a chloroplast
                    d. Chromosomes moving toward the middle of the cell
                    e. Something involving yellow cars with sticky floors

_______ 12. An antenna complex is made up mostly of
                    a. DNA                     b. ATP                     c. Microfilaments
                    d. Chlorophyll                 e. Lots of bobbly heads and flags

_______13. Inducers
                    a. Require ATP to work                             b. Are critical to photosynthesis
                    c. Are often used to start pathways             d. Cover recessive alleles
                                e. Sound like something you'd find at Radio Shack

_______14. During which parts of mitosis is the nuclear envelope always "missing"?
                    a. Metaphase & anaphase                     b. Prophase & telophase
                    c. Interphase only                                  d. Prophase, metaphase & anaphase
                            e. Well, it never seems to be there when the check comes...

_______15.  Position effect is connected to
                    a. Plant orientation                                     b. Microtubule activation
                    c. Synapsis                                                d. Gene location
                                                            e. Cramps

_______16. The growth of multicelled organisms is generally a product of
                    a. Cell division only                                     b. Cell expansion only
                    c. Cell division and cell expansion                d. Added noncellular material
                        e. Consuming some sort of well-advertised breakfast food

_______ 17. Okazaki fragments exist because
                    a. Enzymes digest them for electrophoresis
                    b. Crossing over produces them
                    c. Cell structure is made up of small elements
                    d. DNA strand replication is limited to one direction
                    e. Okazaki could never finish anything

_______18. Southern blotting technique is used
                    a. To locate genes in a genome
                    b. To prepare slides for analysis
                    c. To make multiple copies of a DNA sample
                    d. To prevent movement in cultured cells
                    e. To keep good bourbon from going to waste

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.

2. Describe two concepts that were first developed by Gregor Mendel.

5. What two things need to happen for materials to be assimilated?

4.  For alternation of generations -

5. Transfer RNA has two binding sites. What does each bind to?

8. What are two different types of signal ligands?

9. Polar bodies -

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.

4.  What are three functions that microtubules do in various types of cells?

           _________________________________________________________________
DNA:    T  A  C  A  G  T  C  G  G  A  A  C  C  C  A  T  G  G  G  T  A  C  T  T  A  T  C

Amino acid sequence from (detachable) table at end.

7. Fill in the steps of the typical transduction pathway:

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.

Ferredoxin is a protein complexed with what minerals? Three Points each.

What evidence could be presented to support the idea that actin might be virtually a "perfect" molecule? Four Points.

How was it discovered that telomeres might be important in the aging process? Four Points.

What bad thing might happen if the tail of a sperm cell wound up inside a fertilized egg cell? Four Points

For any organism that has male and female genders, give a functional difference (something one does that the other can't) for - (Four Points each)
                                         Sperm -                                             Egg Cell -

Steroid hormones set up fundamentally different pathways in target cells. Four Points each, how is the pathway different?

Why is it different?

.How is antibiotic resistance used as a reporter gene? Five Points.

The scientist who developed the polymerase chain reaction technique - what was his area of expertise, originally? Four Points

What is the likely earliest human application of cloning? Five Points.

GENE TRANSLATION TABLE

Copyright 2002, Michael McDarby.