Exam 16: Cell Walls, the Extracellular Matrix, and Cell Interactions
Exam 1: An Overview of Cells and Cell Research124 Questions
Exam 2: Molecules and Membranes133 Questions
Exam 3: Bioenergetics and Metabolism138 Questions
Exam 4: Fundamentals of Molecular Biology117 Questions
Exam 5: Genomics, Proteomics, and Systems Biology108 Questions
Exam 6: Genes and Genomes101 Questions
Exam 7: Replication, Maintenance, and Rearrangements of Genomic Dna103 Questions
Exam 8: RNA Synthesis and Processing104 Questions
Exam 9: Transcriptional Regulation and Epigenetics115 Questions
Exam 10: Protein Synthesis, Processing, and Regulation98 Questions
Exam 11: The Nucleus128 Questions
Exam 12: Protein Sorting and Transport110 Questions
Exam 13: Mitochondria, Chloroplasts, and Peroxisomes106 Questions
Exam 14: The Cytoskeleton and Cell Movement106 Questions
Exam 15: The Plasma Membrane109 Questions
Exam 16: Cell Walls, the Extracellular Matrix, and Cell Interactions101 Questions
Exam 17: Cell Signaling114 Questions
Exam 18: The Cell Cycle101 Questions
Exam 19: Cell Death and Cell Renewal107 Questions
Exam 20: Cancer102 Questions
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The X-linked variant of Charcot-Marie-Tooth disease is likely caused by mutations in a gene encoding a probable connexin 32. Suppose your laboratory is working with a human cell line called HeLa cells, which do not express connexins. Propose an experiment to demonstrate that the probable wild-type connexin 32 is actually a gap junction protein.
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How is proline hydroxylation in collagen encoded in the genome? What is the relationship between this encoding mechanism and scurvy?
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How many molecules of the gap junction protein form one open channel between two cells?
(Essay)
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The major cell surface receptor(s) responsible for the attachment of cells to the extracellular matrix is(are)
(Multiple Choice)
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The structural polysaccharide of fungal cell walls is the same as the one found in insect
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In plant cell walls, _______ are highly branched polysaccharides that are hydrogen-bonded to cellulose microfibrils.
(Short Answer)
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The individual units of gap junctions are composed of _______ molecules.
(Short Answer)
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Vitamin C deficiency may lead to scurvy, a disease characterized by skin lesions and blood vessel hemorrhages due to weakened connective tissue. Vitamin C deficiency has this effect because the vitamin is
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The amino acid sequence of a collagen triple helix domain consists of Gly-X-Y repeats, in which X is frequently _______ and Y is frequently _______.
(Short Answer)
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Within the plant cell wall, cellulose microfibrils are embedded in a matrix consisting of proteins and two other types of polysaccharides: _______ and _______.
(Short Answer)
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Basal laminae are formed primarily from type IV collagen and other proteins.
(True/False)
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Describe the structure of an integrin, as determined from the cDNA sequence isolated from fibroblasts by Hynes et al.
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If developing pre-nerve cells expressing only N-cadherin on their surfaces were mixed with epithelial cells expressing only E-cadherin, what would be the most likely result?
(Multiple Choice)
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Why is the term "basal lamina" preferred over the term "basement membrane"?
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Gap junctions allow passage of molecules that have a molecular weight of less than _______ daltons.
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