Multiple choice

The technique known as Gel electrophoresis used to analyse DNA molecule involves __________.

  1. synthesis of new DNA strands from subunits

  2. removal of defective genes from DNA

  3. production of genetically engineered DNA molecules

  4. separation of DNA fragments on the basis of size

  5. replication of DNA fragments
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D Correct answer
Explanation

Gel electrophoresis is a laboratory technique used to separate DNA fragments as per their size through the gel matrix using electricity. The DNA fragments are attracted towards the other end of the matrix, and the smaller molecules move faster than the large ones. This technique is used in DNA profiling to know possible genetic relationships of organisms.

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