Biotechnology (OCR Biology A2)

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1. What happens during the lag phase of a population in a closed culture?

  • bacteria have stopped reproducing due to lack of enzymes
  • bacteria adjust to their new conditions and start to produce new enzymes.
  • bacterial cells start to die
  • bacterial cells grow and divide at their maximum rate
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2. The production of golden rice is an example of.....

  • xenotransplantation
  • gene therapy
  • genetic engineering
  • selective breeding

3. What will cut a section of DNA?

  • reverse transcriptase
  • DNA ligase
  • restriction enzyme
  • plasmid

4. Gene therapy can be used to treat cystic fibrosis. Which of these statements is not true?

  • Cystic fibrosis is caused by a recessive allele
  • Parents who are both heterozygous for cystic fibrosis cannot have a child with the disease.
  • Cystic fibrosis is a diseaese where abnormally thick mucus is produced in the lungs
  • Gene therapy involves inserting the dominant gene into the cells of the lungs

5. Multiple copies of a required piece of DNA can be produced using.....

  • PCR
  • DNA probes
  • electrophoresis
  • replica plating

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