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A selectable marker is used to:

1. Mark a gene on a chromosome for isolation using restriction enzyme.
2. Help in eliminating the non-transformants, so that the transformants can be selected.
3. Identify the gene for a desired trait in an organism.
4. Select a suitable vector for transformation in a specific crop.

Correct answer: Help in eliminating the non-transformants, so that the transformants can be selected.

Solution

A selectable marker is a gene carried by the vector that allows only transformed cells to grow in a selective medium, while non-transformants are eliminated. This makes it possible to identify and isolate the cells that successfully received the foreign DNA.

Related NEET Biology questions

• The sequence that controls the copy number of the linked DNA in the vector, is termed:
• For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of:
• Biolistics (gene-gun) is suitable for:
• PCR and Restriction Fragment Length Polymorphism are the methods for:
• Which one is a true statement regarding DNA polymerase used in PCR
• The separated DNA fragments can be visualised only after staining the DNA with Ethidium bromide followed by exposure to UV radiation.

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