proto-oncogenes It isn\'t very likely to become cancerous. D) C) It has 8 mutati

Question

proto-oncogenes It isn't very likely to become cancerous. D) C) It has 8 mutations in its genes E) It has mutated genes that control metabolism 53) Why isn' this cell cancerous yet? A) Tobacco is harmless B) It needs mutations in some tumor suppressor genes C) The mutations are not critical genes regulating the cell cycle D) It nceds more mutations in the non-coding regions E) It needs more mutations in metabolic pathway genes 54) Of the mutations accumulated in the lung cell, which ones are likely to be the least problematic? A) The 10 mutations in the non-coding regions B) The 2 mutations in proto-oncogenes C) All are equally problematic D) The 4 mutations that control metabolism 55 A) B) The explanation for why this lung cell may progress to cancer can be summarized as the muls-hit hypothesis. True False So) A drug that blocks the re-uptake of a neurotransmiter will have which effect on the responding neuron? A) A stronger excitatory response. B) A stronger inhibitory response. C) A weaker inhibitory response. D) A weaker excitatory response. E) A more sustained response. A new neurotransmitter involved in enhancing shon-term memory called '"crammin" was discovered by researchers to help pic wath memory loss. Some companies want to market the drug to the public as a new supplement to boost memory. 57) Taking this neurotransmitter A) would be a good way to help improve memory B) would be a bad idea because it is sold over the counter. C) will help but requires constant dosages to be useful. D) could adversely affect the balance of neurotransmitters in other regions of the brain. E) would be used by schizophrenics. 58) Which of the following results from too much neurotransmitter being released? A) Lateralization B) Polycythemia Q Depression D) Schizophrenia E) Parkinson's diseaso

Explanation / Answer

Ans 53:

Cancer cells have unregulated growth rate . This is due to ill respinse to cell cycle signals and activation of tumor promoting genes as well as mutation in tumor supressor genes.

Tumor suppressor gene inhibit tumor growth

Correct choice:

(B) it needs mutation in some tumor supressor gene.

Ans 54:

(A) 10 mutation in non coding region.

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