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Title: DNA Post by: Ashdes03 on Dec 12, 2013 1) RNA is structurally different from DNA in that RNA contains
A) ribose sugar and uracil B) ribose sugar and thymine C) deoxyribose sugar and adenine D) deoxyribose sugar and cytosine 2) all the following are examples of physical mutagens except A) gamma rays B) nitrates, benzene, gasoline fumes,PCBs D) ultra violet light rays 3) deletions insertions and frame shift mutations are more serious than a point mutation because A) mis-sense mutations result in more malfunction than nonsense mutations B) more than one gene is affect as a chromosome mutates C) the entire reading of codons is altered nonsense results and no functional proteins can be synthesized D) they remain hidden from gel electrophoresis and DNA fingerprinting 4) deletions and insertions results in a A) substitution and induced mutation B) frame shift mutation and mis-sense C) frame shift mutation and nonsense D) substitution and a silent mutation 5) a random change in DNA that occurs naturally is called a A) induced mutation B) spontaneous mutation C) mis-sense mutation D) nonsense mutation 6) an environmental factor that can contribute to increasing that rate of mutation is said to be a/an A) somatic cell mutation B) germ cell mutation C) induced mutation D) silent mutation Title: Re: DNA Post by: padre on Dec 12, 2013 1) RNA is structurally different from DNA in that RNA contains A) ribose sugar and uracil B) ribose sugar and thymine C) deoxyribose sugar and adenine D) deoxyribose sugar and cytosine A 2) all the following are examples of physical mutagens except A) gamma rays B) nitrates, benzene, gasoline fumes,PCBs D) ultra violet light rays B 3) deletions insertions and frame shift mutations are more serious than a point mutation because A) mis-sense mutations result in more malfunction than nonsense mutations B) more than one gene is affect as a chromosome mutates C) the entire reading of codons is altered nonsense results and no functional proteins can be synthesized D) they remain hidden from gel electrophoresis and DNA fingerprinting the entire reading of codons is altered, nonsense results, and no functional proteins can be syntesized. Limit two questions per thread!! |