Biology Chapter 12

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Anonymous
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198222
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Biology Chapter 12
Updated:
2013-02-05 19:54:47
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bio 12
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bio test on ch 12
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  1. the process in which one strain of bacteria is changed by a gene or genes from another strain of the bacteria.
    Transformation
  2. A type of virus that infects bacteria
    bacteriophage
  3. the nearly perfect fit between A-T and C-G
    Base pairing
  4. Chargaff's Rule
    [A]=[T]    [G]=[C]
  5. the partner of Adenine
    Thymine
  6. the partner of Guanine
    Cytosine
  7. the process of copying DNA prior to cell division. Occurs during the 'S'phase
    Replication
  8. An enzyme that joins individual nucleotides to produce a new strand of DNA.
    DNA Polymerase
  9. An enzyme that breaks down the hydrogen bonds in DNA. It 'unzips' the DNA.
    Hellicase
  10. DNA at the tips of the chromosomes
    Telomeres
  11. An enzyme that adds short, repeated DNA sequences to the telomeres. In rapidly dividing cells, such as stem cells, it helps to prevent genes from being damaged or lost during replication.
    Telomerase
  12. By observing bacterial transformation, Avery and other scientists discovered that the nucleic acid DNA stores and transmits genetic information from one generation to the next.
    TRUE
  13. Hershey and Chase's experiment with bacteriophages confirmed Avery's results, convincing many scientists that DNA was the genetic material found in genes - not just in viruses and bacteria but in all cells.
    TRUE
  14. The DNA that makes up genes must be capable of storing, copying, and transmitting the genetic information in the cell.
    TRUE
  15. DNA is a nucleic acid made up of nucleotides joined into long strands or chains by covalent bonds
    TRUE
  16. The clues in Franklin's X-ray pattern enabled Watson and Crick to build a model of DNA that explained the specific structure and properties of DNA.
    TRUE
  17. The double helix model explains Chargaff's rule of base pairing and how the two strands of DNA are held together.
    TRUE
  18. DNA polymerase is an enzyme that joins individual nucleotides to produce a new strand of DNA.
    TRUE
  19. Replication in most prokaryotic cells starts from a single point and proceeds in two directions until the entire chromosome is copied.
    TRUE
  20. In eukaryotic cells replication may begin at dozens or even hundreds of places on the DNA's molecule, proceeding in both directions until each chromosome is completely copied.
    TRUE

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