Answered: 1. After exposure to a mutagen an A-T…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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1. After exposure to a mutagen an A-T base pairing becomes T-A in the daughter cell. This is an example of: A. Transition B. Transversion C. Transport D. Transfection 2. A mutation in the promoter region of a gene would be expected to be: A. Activating B. Cis-acting C. Null D. Trans-acting 3. A locus can be best defined as: A. A region within a chromosome containing multiple genes B. The genetic position of a mutation C. A type of insect that eats crops D. The location of a gene within the chromosome 4. Which of the following events is not possible in a living cell: A. Information in RNA to be copied into DNA B. Information in DNA to be copied into RNA C. Information in RNA to be copied into a polypeptide D. Information in a polypeptide to be copied into RNA 5. The enzymes that control DNA supercoiling by introducing nicks in one strand are known as: A. DNA polymerases B. Topoisomerases C. Restriction enzymes D. RNA polymerases 6. A null mutation is best defined as one that results in a gene product (i.e. a protein) that: A. Causes the formation of cancer B. Causes the organism that carries it to die C. Is non-functional D. Causes developmental abnormalities 7. The genome can be best defined as: A. The complete sequence of DNA that provides the full set of hereditary information carried by the organism’s cells B. The complete sequence of DNA within all the chromosomes C.The complete sequence of DNA that provides the full set of hereditary information carried by the germ cells D. The contents of the cell’s nucleus 8. An allele can be best defined as: A. A mutation B. A particular version of a gene C. A chromosomal aberration D.A gene found only on the X-chromosome 9.In the human ABO blood group system, which of the following represents a null allele: A. 0 B. A C. B D.AB 10. The wrapping of DNA strands around each other in the opposite direction to the strands in the double helix can be best described as: A. B to Z form transition B. Negative supercoiling C.Positive supercoiling D. Overwinding

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