Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome.
16) If she moves the promoter for the lac operon to the region between the beta galactosidase gene and the permease gene, which of the following would be likely?
A) Three structural genes will no longer be expressed. B) RNA polymerase will no longer transcribe permease.
C) The operon will no longer be inducible. D) Beta galactosidase will be produced.
E) The cell will continue to metabolize but more slowly.
A researcher has arrived at a method to prevent gene expression from Drosophila embryonic genes. The following questions assume that he is using this method.
51) The researcher in question measures the amount of new polypeptide production in embryos from 2—8 hours following fertilization and the results show a steady and significant rise in polypeptide concentration over that time. The researcher concludes that
A few decades ago, Knudsen and colleagues proposed a theory that, for a normal cell to become a cancer cell, a minimum of two genetic changes had to occur in that cell. Knudsen was studying retinoblastoma, a childhood cancer of the eye.