Many types of cancer are known to overexpress the receptor protein tyrosine kinase. Which molecular technique can be used to reduce expression of an oncogene in vitro?
A) PCR
B) DNAse sensitivity assay
C) RNAi
D) Southern blotting
E) western blotting
C
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You and your biology lab class take a field trip to a marine aquarium. Your guide is a marine biologist who studies squids. She explains to your class how squids are able to blend into their environment. She points out that squids have pouches of pigments embedded in their epithelium. The pouches are called
A. trochophores. B. spermatophores. C. lophophores. D. chromatophores. E. phytophores.
Which of the following can describe osmosis?
a. an active transport process b. a type of endocytosis c. the diffusion of water d. the process of moving solutes through the cell
Synthesis of a repressible enzyme is inhibited by
A. substrate bound to repressor. B. corepressor and repressor binding to operator. C. repressor alone bound to operator. D. substrate bound to promoter.
Which of the following experiments helped B. F. Skinner develop the idea of operant conditioning?
A. Young geese were exposed to Skinner shortly after their birth so they would think he was their mother. B. A dog would salivate when presented with a bowl of food so a bell was rung to build the association between the bell and food. C. A dog was trained to put its paw on a lever in order to receive a pellet of food as a reward. D. A rat was trained to run a maze in a short amount of time in order to receive a reward. E. A rat was trained to pull a lever to receive a reward of a food pellet.