AS Biology AQA Unit 2

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1. What does chemotherapy do to the cell cycle of cancerous cells?

  • Stop replication of DNA
  • Stop replication of DNA and inhibit spindle formation to stop metaphase.
  • Stop metaphase
  • Prevent G1 from occurring
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2. Enzyme responsible for reforming hydrogen bonds and joining nucleotides to a polynucletide strand

  • DNA helicase
  • DNA polymerase
  • RNA polymerase
  • Ligase

3. Which blood vessel goes from the kidneys to the heart?

  • Carotid Artery
  • Renal vein
  • Hepatic portal vein
  • Renal artery

4. Purpose of centromere

  • Attach to spindle fibres
  • To keep chromatids together
  • For spindle fibres to attach to and separate sister chromatids
  • To separate sister chromatids

5. What is telophase?

  • When the spindle fibres break down and the nuclear envelope and nucleolus reform
  • 3rd stage of meiosis
  • 2nd stage of mitosis
  • Cellular division

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