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What is the purpose of using a selectable marker in genetic engineering? (2023)

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Question: What is the purpose of using a selectable marker in genetic engineering? (2023)

Options:

  1. To enhance gene expression
  2. To identify successfully transformed cells
  3. To increase DNA stability
  4. To promote cell division

Correct Answer: To identify successfully transformed cells

Exam Year: 2023

Solution: 

Selectable markers are genes that confer resistance to antibiotics or other substances, allowing researchers to identify cells that have successfully taken up the recombinant DNA.

What is the purpose of using a selectable marker in genetic engineering? (2023)

Practice Questions

Q1
What is the purpose of using a selectable marker in genetic engineering? (2023)
  1. To enhance gene expression
  2. To identify successfully transformed cells
  3. To increase DNA stability
  4. To promote cell division

Questions & Step-by-Step Solutions

What is the purpose of using a selectable marker in genetic engineering? (2023)
  • Step 1: In genetic engineering, scientists want to add new DNA to cells.
  • Step 2: Not all cells will take up the new DNA; some will remain unchanged.
  • Step 3: To find out which cells have successfully taken up the new DNA, scientists use a selectable marker.
  • Step 4: A selectable marker is a gene that gives the cell a special ability, like resistance to an antibiotic.
  • Step 5: Scientists then add the antibiotic to the environment.
  • Step 6: Only the cells that have the selectable marker (and thus the new DNA) will survive the antibiotic.
  • Step 7: Researchers can easily identify and study these surviving cells.
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