Question

Separating DNA fragments by gel electrophoresis is useful for which of the following?

1) identifying DNA fragments for RFLP analysis
2) distinguishing between different alleles of a gene
3) all of the above
4) purifying specific DNA fragments
5) identifying a plasmid or a virus by examining its restriction fragment pattern

Answer 1

Gel electrophoresis is a useful technique in molecular biology to separate DNA fragments based on size. It is used to identify DNA fragments for RFLP analysis, distinguish between alleles of a gene, purify specific DNA fragments, and identify a plasmid or virus by examining its restriction fragment pattern. The option (3) is correct.

Step-by-step explanation:

Gel electrophoresis is a useful technique for several applications in molecular biology. It allows for the separation of DNA fragments based on their size.

This technique is commonly used for identifying DNA fragments for RFLP analysis and distinguishing between different alleles of a gene. Gel electrophoresis can also be used to purify specific DNA fragments and identify a plasmid or virus by examining its restriction fragment pattern. Therefore, option (3) is correct.