How can one identify oncogenes?
a) by introducing the DNA suspected of containing the oncogene into cultured cells and looking for altered growth properties
b) by fusing two normal cells together
c) by fusing two malignant cells together
d) by introducing the DNA suspected of containing the oncogene into cultured cells and looking for altered nuclear membranes
Ans: a) by introducing the DNA suspected of containing the oncogene into cultured cells and looking for altered growth properties
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Complementary nucleic acid hybridization, which is coupled with nucleic acid replication and applied repeatedly through numerous cycles, is based on which of the following methods?
a. Hybridization b. Sequencing c. Amplification (PCR) d. Genotypic
Staphylococcus epidermidis can be characterized by all of the following except that it
A. can be associated with nosocomial infections. B. produces a yellow pigment. C. is not pigmented. D. does not produce coagulase.
Wöhler revolutionized biology through his demonstration that biological molecules are governed by the ordinary laws of physics and chemistry. He demonstrated this principle by
A) synthesizing urea in the laboratory from ammonium cyanate. B) developing techniques for isolating, purifying, and analyzing subcomponents of cells. C) defining the laws of heredity. D) discovering active agents in cell extracts that were specific biological catalysts that have since come to be called enzymes. E) inventing mass spectrometry which is commonly used to determine the size and composition of individual proteins.
Cancer cells exhibit changes in morphology consistent with
a) Terminal differentiation b) Trans-differentiation c) Onco-differentiation d) De-differentiation