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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§ mOI6c.ule& ..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 recleves - 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-segmeRt palarit) gene _C~~leffaclgene 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?
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