Genetic engineering is applied to techniques like DNA cloning in which the steps are: step 1: DNA cutting from the parent source; step 2: DNA cut is pasted into the matrix to be modified; step 3: matrix is introduced to the host cell and step 4, vector DNA is isolated. Answer then is B.
By the help of Restriction enzymes, DNA is cut into smaller pieces. Then the DNA is cut into fragments that has hundreds of bases, the restriction enzyme then cuts the DNA and all the pieces have different sequence of nucleotide.
Genetic engineering can be used in human growth hormones, making clones and many other useful things.
