BIO 171 - Third Exam - 2015

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. The primary cellular component of muscle is

                a. Microfilaments         b. Microtubules         c. Rough membrane        d. Intermediate filaments
                                                            e. Cytomusculosomething

_______ 2. Amino acid synthesis in the first land plants depended directly upon

                a. Algae inclusions         b. Organic breakdown        c. Photosynthesis         d. Fungal symbionts
                                        e. Following the package directions closely

_______ 3. The "screening" done by immune cells often involves interaction with

                a. Ligands         b. Nuclei         c. Glycocalex        d. Flux variations         e. Tiny little surveys

_______ 4. Central vacuoles are used to

                a. Process secretions         b. Support plants        c. Provide osmotic stability         d. Reinforce nuclei
                                                            e. Show where the middle is

_______5. The fluidity of a cell membrane is closely associated with

                a. Cholesterol         b. Binding sites        c. Cotransport         d. Steroids        e. How drunk it gets

_______6. Cyclic AMP is commonly used as a(n)

                a. Active transport system         b. Energy source        c. Second messenger         d. Gene activator
                                                                        e. Stirring spoon

_______7. The cells in hyphae should not have

                a. Plasmids         b. Cell Walls         c. Nuclei        d. Mitochondria         e. Investments overseas

_______8. Metamorphosis typically

                a. Occurs with alternation of generations        b. Requires a complete change of environment / location
                c. Increases a species' carrying capacity         d. All of the above
                                    e. Requires a highly varied wardrobe

_______9. Dynein has a critical role in

                a. Transduction         b. Transport within a cell        c. Chemotaxis
                d. Transport through the cell membrane

                e. Making super-heroes - it just sounds like that kind of origin-story stuff

_______10. Worn-out cells often go through what process?

                a. Apoptosis         b. Replication        c. Metastasis         d. Rejuvenation
                            e. Always complaining about their aches and pains

_______11. Topoisomerase and helicase are both involved in

                a. Transduction         b. Flagellar motion        c. Active transport         d. DNA replication
                                                    e. Tougher rounds on Jeopardy!

_______12. Both plants and animals have tissues with these primary functions -

                a. Respiration and reproduction         b. Secretion and protection        c. Surface and support
                d. Respiration and photosynthesis                e. Snot removal and dabbing while crying

_______13. G Proteins are typically found

                a. In the nucleus         b. On the outside of the cell membrane        c. In ribosomes
                d. On the inside of the cell membrane        e. Shouldn't it be someplace that starts with "g"?

_______14. Knowledge of which process is a primary product of C. elegans research?

                a. Reproduction         b. Fungal zones         c. DNA processing        d. Development
                                                        e. Online shopping

_______15. Arabidopsis would probably have been involved in the study of

                a. Digestive function         b. Flowering mechanisms        c. Gastrulation         d. Basic genetics
                                                    e. Yet another anti-muslim news story

_______16. Golgi bodies should be active during

                a. Animal prophase         b. Fungal telophase        c. Bacterial interphase
                d. Plant anaphase                    e. Late nights in the Golgi pit

_______17. What is indicated by the presence of rough endoplasmic reticulum?

                a. Production of secretions        b. Preparation for cell growth        c. Preparation for reproduction
                d. Production of materials used somewhere else in the cell
                e. Yet another question that makes no sense

_______18. An acrosome has an important function in what process?

                a. Fertilization        b. Storage of photosynthetic products        c. Production of spindle fibers
                d. Spore production        e. Putting one more "-some" word on the much-too-long list

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. Fresh-water fish use two different strategies to prevent osmotic damage - what are they?


2. What two different structures do spindles attach to?


3. For spiral cleavage -
Describe the

WHEN does

4. For Okazaki fragments -
are they

5. What are the two different general cell functions that happen during interphase?


6. The abilities of early pollen probably derived from what two abilities that had "recently" evolved?


7. Give a basic function for each -


BONUS - What particular type of structure are these?

8. What are the fungal growth zones? (Names only)



9. Give two different types of signal ligands -


10. What are two stages of the cell cycle when cytokinesis should not happen?


11. Two ways that a cell is likely to increase flux of a type of incoming material -


12. Researchers into telomerase mechanisms in aging -
Hope to get
what, particularly,
to happen?
May get what

13. Give two general examples of cooperative coevolution in land plants.


14. The plant cells in the diffusion lab have a very low permeability to sodium and chloride. Why?

15. Systems with positive feedback control tend to require control of the control. Why?

16. Briefly explain where "brand new" genes / abilities come from.

17. Intermediate filaments are divided into classes based upon what two different factors?


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. Give the names and basic functions of three molecular-complex organelles.

2. For the endosymbiont theory -
Two organelles most closely associated -

Two pieces of strong supporting evidence for the theory -


3. There are three different evolutionary "rationales" for alternation of generations.  What are they?


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




5.  For each embryonic germ layer, name the layer and give one organ system that is mostly derived from that layer.







6. Give three sets of differences between -




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


8. Explain in some detail how geotaxis works in a germinating seed.

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.

Why is it unlikely that contractile vacuoles are filled using osmosis? Three Points.

How is apoptosis "supposed" to be pronounced? Three Points.

Cancers "turn on" abilities that allow them to thrive and spread. For Two Points Each, give such specific abilities.

The endosymbiont theory was strongly resisted because it was new and odd, but what was the non-science likely reason for the resistance? Three Points.

What was the actual purpose of the salt in the diffusion lab salt solution? Three Points.

What is the counter-force to root pressure? Three Points.

What types of human cells depend on gates for their main function? Three Points each.

Interphase has a stage that follows the synthesis stage. Why? Three Points.

What fairly well-known structure does not appear to have an official biological name? Three Points.

The timing of meiosis in egg cell production varies widely in animal groups. Why do the stages get delayed? Three Points.

What is ringworm? Three Points.

For Mendel - why did he use pea plants? Three Points.




BI 171



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