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4 Written questions

3 Multiple choice questions

  1. A substance or energy source that alters DNA.
  2. 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.
  3. The 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 True/False questions

  1. base pairA pair of complementary nitrogenous bases that have formed hydrogen bonds with each other.

          

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

          

  3. 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.

          

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