EXAM_3_review_questions_covering_CH_9_thru_CH_12_first_half_ANSWERS_EMBEDDED

EXAM_3_review_questions_covering_CH_9_thru_CH_12_first_half_ANSWERS_EMBEDDED

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CHAPTER 9 DNA: The molecule of heredity
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____ CH9-1. Friedrich Miescher is credited with a. proposing DNA as the hereditary material. b. finding a cure for pneumonia. c. telling us that A=T and G=C. d. discovering nucleic acids.
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____ 1. Friedrich Miescher is credited with a. proposing DNA as the hereditary material. b. finding a cure for pneumonia. c. telling us that A=T and G=C. d. discovering nucleic acids.
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____ CH 9-2. Fred Griffith's experiments a. produced a vaccine against bacterial pneumonia. b. demonstrated that rough (R) bacteria cause pneumonia. c. provided evidence that genetic material from one bacterial culture could be transferred to another culture. d. showed that rough bacteria injected into mice will be changed by the mice to smooth (S) bacteria. e. converted harmless smooth bacteria into lethal rough bacteria.
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____ 2. Fred Griffith's experiments a. produced a vaccine against bacterial pneumonia. b. demonstrated that rough (R) bacteria cause pneumonia. c. provided evidence that genetic material from one bacterial culture could be transferred to another culture. d. showed that rough bacteria injected into mice will be changed by the mice to smooth (S) bacteria. e. converted harmless smooth bacteria into lethal rough bacteria.
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____ CH 9-3. The significance of Fred Griffith's experiment in which he used two strains of Streptococcus pneumoniae is that a. the semiconservative nature of DNA replication was finally demonstrated. b. it demonstrated that harmless cells had become permanently transformed through a change in the bacterial hereditary system. c. it established that pure DNA extracted from disease- causing bacteria transformed harmless strains into killer strains. d. it demonstrated that radioactively labeled bacteriophages transfer their DNA but not their protein coats to their host bacteria. e. all of these
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____ 3. The significance of Fred Griffith's experiment in which he used two strains of Streptococcus pneumoniae is that a. the semiconservative nature of DNA replication was finally demonstrated. b. it demonstrated that harmless cells had become permanently transformed through a change in the bacterial hereditary system. c. it established that pure DNA extracted from disease- causing bacteria transformed harmless strains into killer strains. d. it demonstrated that radioactively labeled bacteriophages transfer their DNA but not their protein coats to their host bacteria. e. all of these
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____ CH 9-4. Which of the following statements is NOT true about Fred Griffith's experiments? a. Mice injected with smooth (S) bacteria die. b. Mice injected with heat-killed smooth bacteria die. c. Mice injected with heat-killed smooth bacteria and live rough (R) bacteria die. d. Mice injected with rough bacteria live. e. Smooth bacteria are transformed into harmless rough bacteria.
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____ 4. Which of the following statements is NOT true about Fred Griffith's experiments?
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