Practice Midterm I B Key

Practice Midterm I B Key - Name ID Midterm I MCDB 165A FALL...

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Name: ID# Midterm I MCDB 165A – FALL 2006 BIOLOGY OF THE CELL
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Name: ID#: 1 TRUE OR FALSE (10 points) 1. MAGUKs comprise a family of tyrosine kinases involved in cell surface signaling events. False 2. Stimulation of fat cells by insulin leads to the endocytosis of glucose transporters. False 3. In eukaryotic organisms the plasma membrane is 5-10 um thick. False 4. The inhibitory G protein (Gi) inhibits adenylyl cyclase by regulating ion channels. True 5. The positive charge of proteoglycans is due to the presence of glycosaminoglycan chains and allows for binding to growth factors. True 6. The structure of both Cadherins and Integrins is calcium-dependent. True 7. Integrins can bind to members of the immunoglobulin superfamily, cadherins and extracellular matrix proteins. False 8. Selectins are required for recruitment of leukocytes to sites of infection. True 9. Type II collagen is present in all cartilages. True 10. Fibronectin is a homotrimeric glycoprotein present in the extracellular matrix. False
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Name: ID#: 2 MULTIPLE CHOICE (30 points) 11. FRET (Fluorescence Resonance Energy Transfer) can be used to study: a) protein-protein interactions b) protein-DNA interactions c) protein conformational changes d) a and b e) all of the above e) 12. Requirements for culture of mammalian cells include all of the following except: e) 13. To observe tissue under a bright field light microscope the specimen must be: d) 14. Cholesterol e) 15. Confocal microscopy a) utilizes lasers as a light source b) visualizes specimens thicker than a light microscope c) requires fluorophores d) a and b e) all of the above e) 16. Carbohydrates on the cell membrane can do all of the following, except:
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3 a)
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