Agricultural Biotechnology - Study Mode

Explanation

Solution: Gene cloning is like making photocopies of a specific gene. To do this, we need some important tools. A vector is like a vehicle that carries the gene we want to copy. Think of it as a special type of DNA that can easily enter a cell. A host is the living organism (like a bacteria) that will receive the gene and make many copies of it. It's where our copied gene will live and multiply. Restriction enzymes are like molecular scissors. They cut the DNA at specific spots, allowing us to precisely insert our gene into the vector. DNase is an enzyme that breaks down DNA. In gene cloning, we want to preserve the DNA, not destroy it, so we don't need DNase. It would actually prevent the cloning process from working properly. Therefore, the answer is D: DNase because it is not needed for gene cloning.