Question

Which of the following is not a tool in genetic engineering?

• A. Restriction endonucleases and ligases
• B. Exonuclease
• C. Reverse transcriptase
• D. Vectors and Markers

Answer 1

The correct option is B Exonuclease

Genetic engineering procedures require various molecular tools such as restriction endonucleases, ligases, reverse transcriptases, vectors and markers. Restriction exonucleases are enzymes that cleave nucleotides from the end of a polynucleotide chain. These enzymes do not have a specific cut site or recognition sequence, hence are not used in normal genetic engineering procedures as they require high specificity.