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4 Written questions

3 Multiple choice questions

  1. The insertion of an incorrect nitrogenous base during DNA replication that is not detected and corrected.
  2. 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. The key enzyme that cells use to replicate their DNA. In DNA technology, DNA polymerase is used in the polymerase chain reaction to make many copies of a gene or other DNA sequence.

3 True/False questions

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


  2. 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.


  3. DNA replicationThe 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.