BIS 104 FALL 2011 Exam I answer key

BIS 104 FALL 2011 Exam I answer key - BIS 104 FALL 2011...

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BIS 104 FALL 2011 Exam I answer key 1. A. VEGFR a. VEGFR is located in the plasma membranes of endothelial cells and some cancer cell lines. b. it is a protein c. its function is to bind VEGF and transmit this signal across the PM to initiate an cytoplasmic signaling pathway leading to proliferation and differentiation of ECs (angiogenesis) B. Lysosome a. located throughout the cytoplasm of eukaryotic cells as part of the endomembrane system. b. a membrane-bound organelle containin g high concentrations of hydrolytic enzymes such as DNAase, RNAase, lipases, proteases, carbohydrases. c. function is specific digestion of internalized cellular macromolecules and macromolecular complexes; creates components for recycling and precursors for re-synthesis. C. Nucleolus a. located within the nucleus of eukaryotic cells. b. composed of repeated (amplified) copies of rDNA , along with rRNA transcripts, and some ribosomal proteins. c. site of rRNA transcription and initial assembly of ribosomes . 2. 1. exportins : select and associate with specific mRNAs and escort them to the nuclear membrane. 2.
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BIS 104 FALL 2011 Exam I answer key - BIS 104 FALL 2011...

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