Drugs such as Gleevec® and Herceptin® represent a modern approach to cancer treatment because they
A) target specific gene alterations that occur in some cancers.
B) target metabolic pathways that are common to all cells.
C) enhance apoptotic pathways in all cells.
D) target proteins that are present in both normal and cancer cells, but that cancer cells rely on more than normal cells do.
A) target specific gene alterations that occur in some cancers.
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In comparing mitosis and meiosis, which of the
following statements is true? a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Pairing of homologues occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.
Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that provide an estimate of coliform numbers in the water is called the ________.
A. standard plate count B. most probable number (MPN) C. membrane filter method D. coliform count
Which one of the following features of plant cells is NOT common with animal cells?
A. cellular respiration B. lipid bilayer membranes C. active transport D. electrochemical gradients E. turgor pressure
Which organisms would most likely be present on the bottom or closest to the actual surface of a complex microbial biofilm?
A. Facultative chemoorganotrophs B. Anaerobic sulfate-reducing bacteria C. Eukaryotic protists D. Cyanobacteria