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4 Written questions

3 Multiple choice questions

  1. The duplication, or copying, of a DNA molecule. DNA replication begins when the hydrogen bonds connecting the two strands of DNA are broken, causing the strands to unwind and separate. Each strand is then used as a template for the construction of a new strand of DNA.
  2. A pair of complementary nitrogenous bases that have formed hydrogen bonds with each other.
  3. The structure of DNA, in which two long strands of covalently bonded nucleotidesare held together by hydrogen bonds and
    twisted into a spiral coil.

3 True/False questions

  1. DNA repairA three-step process in which damage to DNA is repaired. Damaged DNA is first recognizedthen removed, and then replaced with newly synthesized DNA.


  2. DNA sequenceThe sequence, or order, in which the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T) are arranged in a gene or a DNA fragment, or in an organism's genome.


  3. mutagenA form of programmed cell death that generally benefits the organism.


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