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For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of:

1. Silver or Platinum
2. Platinum or Zinc
3. Silicon or Platinum
4. Gold or Tungsten

Correct answer: Gold or Tungsten

Solution

Gold and tungsten are used as microprojectiles because they are dense, inert, and can be coated with DNA for delivery into cells. Their physical properties make them suitable for being shot into tissues without easily reacting or degrading the genetic material.

Related NEET Biology questions

• The sequence that controls the copy number of the linked DNA in the vector, is termed:
• 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.
• Given below are four statements pertaining to separation of DNA fragments using Gel electrophoresis. Identify the incorrect statements. (i) DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal. (ii) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA. (iii) Smaller the size of DNA fragment, larger is the distance it travels through it. (iv) Pure DNA can be visualised directly by exposing to UV radiation. Choose correct answer from the options given below:

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