This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: My dog thinks hes Elvis (opening act for Lyle Lovett, I forget who it was but he was fun) BIOS 100 EXAM 4 December 6, 2006 Name _______________ 27. Where are the enzymes found to process ABC chains of proinsulin and turn it into the final, active, insulin molecule? A. in liver cells Endoplasmic Reticulim membranes B. in pancreas cells Golgi apparatus C. in ribosomes of the recombinant virus D. in the nuclei of the muscle cells that respond to insulin 28. What is common to the signal transduction mechanisms of 1) insulin actions and 2) development of the inner vulva in the c. elegans worm? A. they both involve activation of Protein Kinase C B. both systems have a tyrosine kinase as a receptor for the signal molecule. C. they both result in exocytosis of a second signal molecule. D. none of the above are true. 29. Which are general characteristics of Signal Transduction systems that we have discussed? A. they involve release of a molecule from one cell that travels to another, target cell, which can be either nearby or quite far away. B. they involve generation of thousands of secondary molecules inside the target cell C. they usually involve a receptor protein in the target cell membrane since the signal often cannot permeate cell membranes D. A and C above E. A, B and C above. 30. Why did the gene therapy designers use a modified version of insulin, instead of the real thing? A. because they needed a less effective ( 20-40%) molecule since the liver is already sensitive to insulin B. the B-chain had to be changed since Beta cells of the pancreas were destroyed in the diabetic rats C. they needed to modify the C-chain since liver cells dont have the converting enzymes to remove it D. they needed a molecule that would cross the blood-brain barrier 31. Which cells will divide and differentiate to become the outer vulva? 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. 32. 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 D. release of the anchor cell 33. How does work? A by stimulating sympathetic nerves to the penis B. by causing NANC cells to release more NO ( nitric oxide) C. by blocking the enzyme, guanylyl cyclase, that makes cGMP D. by blocking the enzyme, PDE, that breaks down cGMP 34. How does an erection occur?...
View Full Document