#someonetellokun There goes the multiple choice questions 1.How can proteins be activated, processed, and degraded? → Proteins are degraded by the attachment of ubiquiton. Some cell surface proteins must be transported to proper destinations to work. CORRECT: This is true. What is an example of an inducible operon? → The LAC operon CORRECT: This is true. What are three mechanism for converting a proto-oncagene to an oncogene → The failure of cells to respond to control mechanisms of a cell CORRECT: This is false. It should be What are three mechanism for converting a proto-oncagene to an oncogene → 1) movement of DNA within genome 2) amplification of proto-oncogenes 3) point mutations in proto-oncogene. What is an inducible operon? → An operon that is usually off, but can be induced to turn on by interaction between moleces and regulatory proteins. CORRECT: This is true. How can both repressible and inducible operons be negative regulators? → 1) Repressible operons are negative regulators because tryptophan activates regulatory proteins which does not allow RNA polymerase to bind to the promoter region. This decreases protein yield. 2) In inducible operons, if glucose is increased, CAP unbinds and genes are expressed less. CORRECT: This is true.
Posted on: Mon, 22 Jul 2013 10:05:21 +0000
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