Exam 2, 03 - ~ BIO321 Exam 2 Fall 2003 Page 1 of 4 1....

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~ 1. Parscrine signalling between cells is the type of cell communication that ,. ~ocel signalling molecules with a long half life that can be said to be l'IIghly specific B. local signalling molecules with a long half life that can be said to be relatively non-specific ~ C. local signalling molecules with a short half life that can be said to be relatively non-specific .9-. ICRg raRge sigRallil'l§ .ill. ti !lhull hellt IIfa E.-long-r8nge-signa\liftg-me!ettlee with I~. . corth ,ft) reeelHere 2. The transfer of a phosphate group to a molecule or compound is called ~ A. hydrogenation. B. hydrogen bonding. C. phosphorylatlon.- D. Ionization. E. carboxylation. 3. In cell biology, signal Integration refers to A. the process of producing one response from the cell after recieving an endocrine signal at low concentration B. the process of producing one response from the cell after recieving an endocrine signal at high concentration C. the process of "reading" different effector molecules and producing a response from the cell that is the summation of the information it recleves - D. the process of producing multiple responses In the absence of any signaling molecules E. the process where the cell combines multiple signaling events and produces a static fixed response, irrespective of the signal recieved 4. Most eucaryotic genes that control embryonic development are regulated by the binding of only one or two gene regulatory proteins. A.True '- B.False - 5. What are the differences between the MHC1 and MHC2 molecules? . \1HC1 is expressed by all nucleated cell types, MHC2 is expressed JOlyspecific cell types ' ~HC1 is a single polypeptide complexedwith beta2 microglobulin, MHC2 is a dimeric polypeptide C. CD8+ T celis bind to MHC1 complexes, CD4+ T cells bind to MHC2 complexes D. All of the above are true differences ..- E. C and D are true differences 6. What is antennapedia? A. A pair-rule gene palarit) gene _C~~leffaclgene D. A homeotic gene - E. A gap gene 7. Ali the gene products required to construct the bodyform of drosophilla are derived from the zygotic nucleus. A.True - B. False 8. Which best describes the formation of segment boundaries in vertbrates? A. Overlapping expression of different Hox genes' B. Overlapping and individual expression of different Hox genes- C. Overlapping expression of different gap genes D. Overlapping and individual expression of different gap genes 9. Enzyme linked recaptors bind to A. Calcium B. dlmerlzed signalling molecules C. growth factors D.cAMP E.both band C-- BIO321 Exam 2 Fall 2003 Page 1 of 4 10. Which ofthe following would produce the steepest threshold event in response to signalling molecules? A. 2 signaling
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This note was uploaded on 02/05/2012 for the course BIOLOGY BIO 320/32 taught by Professor Dr.c during the Spring '11 term at Murray State KY.

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Exam 2, 03 - ~ BIO321 Exam 2 Fall 2003 Page 1 of 4 1....

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