Test%204%20complete%20Bios%20100%20fall%2008

Test%204%20complete%20Bios%20100%20fall%2008 - Bios 100...

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Bios 100 Fall 2008 Test #4 December 3, 2008 50 questions Somebody said they saw me swinging the world by the tail, … Killing the blues Robert Plant/Allison Kraus, 2007 ( quote provided by Steve Kelso ) 1. Place the events for cloning Dolly (Somatic Cell Nuclear Transfer) in proper order. 1. transfer blastocyst from in vitro (dish) into uterus of surrogate mother 2. transfer nucleus from mammary gland cell into enucleated egg 3. remove donor egg from an unrelated female sheep 4. remove nucleus from donor egg 5. shock egg with electricity and/or calcium to trigger fertilization-like events 6. grow 5-8 days for in vitro into stage A. 6, 4, 5, 2, 1, 3 B. 1, 3, 5, 2, 4, 6 C. 3, 4, 2, 1, 6, 5 D. 3, 2, 4, 1, 5, 6 E. 3, 4, 2, 5, 6, 1 Question 2: True/False (A/B ) 2. The development of the vulva illustrates an example of how cytoplasmic determinants work in development. For question 3: Several properties are general properties of signal transduction systems, as we discussed I. they involve release of a signal molecule from one organ, which travels to another, target cell, possibly in a different organ. II. . The signal is amplified by the production of thousands of second messenger molecules inside the target cell. III. they often use a receptor protein in the target cell membrane to initiate a cascade of events in the target cell. 3. Regarding the specific signal transduction path in vulva development that involves a tyrosine kinase receptor which statement is FALSE?? A. it requires two signal molecules to work, because there are two receptor subunits that need to come together to start the internal processes B. each receptor/subunit works first by phosphorylating the other subunit’s tyrosine amino acids C. each receptor/subunit is responsible for transporting a thousand signal molecules from outside to inside the cell D. internally, the result is often the phosphorylation of a substrate that is itself another kinase
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For questions # 4-7, Remember the worm development of the vulva story, in C. elegans worms? Use these choices: A. cells that release the first inducer molecule B. cells adjacent to the cell that is exposed to the highest concentration of first inducer molecule C. cells that make and release the second inducer molecule D. cells at the edges of the 6 precursor cells. E. cells that are responsible for binding the bicoid protein 4. Which cells will divide and differentiate to become the inner vulva? 5. Which cells will divide and differentiate to become the skin (epidermal) cells? 6. Which cells will divide and differentiate to become the outer vulva? 7. Which cells are the anchor cells? 8. In development of the C. elegans vulva, when one of the six precursor cells receives the first inducer signal, a cascade of events occurs, that results in: A. exocytosis of insulin, triggered by tyrosine kinase B. making and inserting a membrane protein, which acts as the second inducer C. a mutation of the DNA for the vulva genes
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Test%204%20complete%20Bios%20100%20fall%2008 - Bios 100...

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