bio 101 f08 exam 1 final

bio 101 f08 exam 1 final - Bio 101 Fall 2008 Exam I A Name...

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Bio 101 - Fall 2008 Exam I A Name___________________________________ If you don’t understand a question, please ask for clarification. Good luck!!! Part I: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 20 questions @ 3 points each = 60 points 1)  1
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W h at is the most likely role of a cell that contains an extensive  smooth  endoplasmic reticulum? a) 
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It synthesizes large  quantities of lipids.  b) 
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It stores genetic  information  c) 
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It plays a role in  immune function.  d) 
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It plays a role in  ATP and sugar production.  e) 
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It actively exports  protein molecules.    2) 
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W h a t will happen to a red blood cell (rbc), which has an internal ion concentration of about 0.9  percent, if it is placed into a beaker of pure water ?  ( Note : the rbc membrane is  not   permeable to the ion, but is permeable to water) a) 
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T h e cell would swell because the water in the beaker is hypertonic relative to the  cytoplasm of the rbc  b) 
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Nothing.  c) 
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T h e cell would shrink because the water in the beaker is hypotonic relative to the  cytoplasm of the rbc.  d) 
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T h e cell would swell because the water in the beaker is hypotonic relative to the  cytoplasm of the rbc.  e) 
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T h e cell would shrink because the water in the beaker is hypertonic relative to the  cytoplasm of the rbc.    3) 
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C h o o s e   t h e correct order of events that occurs after insulin binds to its tyrosine kinase receptor  (enzyme linked signal transduction pathway): 1: Connected to the receptor via bridge proteins, Ras proteins are activated by exchanging  GDP for GTP 2: Phosphorylation cascade of numerous proteins each being activated using ATP 3:  The signal receptor complex changes conformation and is phosphorylated 4: Glucose transporters are moved from vesicles in the cytoplasm to the plasma membrane  in order to increase the cell's glucose uptake. a) 
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3:2:1:4  b) 
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2:1:3:4  c) 
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3:1:2:4  d) 
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1:2:4:3  e) 
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2:1:4:3    4) 
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A steroid  hormone increases gene expression in a target cell by: a) 
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Using a cascade of  phosphorylated proteins to improve signal transduction  b) 
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Binding to  receptors located inside the cell  c) 
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A tyrosine kinase  (enzyme linked) signal transduction pathway d) 
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A G-Protein  coupled signal transduction pathway  e) 
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Secondary  messengers    5) 
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People  suffering from Type II diabetes would most likely lack: a) 
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Vesicles full of  insulin in the  β  cells of the pancreas  b) 
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Glucose  transporters on the  β  cells of the pancreas  c) 
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Insulin receptor  proteins  d) 
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Chaperone  proteins to fold insulin in the rough endoplasmic reticulum of the pancreatic  β  cells  e) 
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bio 101 f08 exam 1 final - Bio 101 Fall 2008 Exam I A Name...

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