Which best describes genetic engineering?
A. Fragments of DNA that have desired genes are isolated to form recombinant DNA for use in a host.
B. All the DNA from a desired organism is isolated to form recombinant DNA for use in a host.
C. Different sections of DNA from a desired organism are inserted into a host so that beneficial traits will be expressed.
D. One strand of DNA is isolated and inserted into a host so recombinant DNA can be formed.
Answer (3)
Answer:
The correct answer would be **a. Fragments of DNA that have desired genes are isolated to form recombinant DNA for use in a host. **
Genetic engineering refers to the direct manipulation or modification of the desired gene in a cell in order to produce novel or improved organism.
It includes isolation of DNA fragment that has desired gene such antibiotic resistance gene, pest resistance gene et cetera. It is done with the help of restriction endonuclease.
The isolated gene is then copied or cloned with the help of polymerase chain reaction or cloning vector.
The cloned gene is then transferred to the cell of the host organism. It can be done with the help of various techniques such as micro-injections, plasmid vectors, non-pathogenic viral vector, gene gum, T-plasmid et cetera. It depends on the type of host cell.
The transformed cell will have the desired characteristics or trait.
Genetic engineering is best defined as the process in which desired gene segments are isolated to create recombinant DNA within a host organism, enabling the expression of the desired traits.
Genetic engineering is best described by option A: Fragments of DNA that have desired genes are isolated to form recombinant DNA for use in a host. This process involves separating a segment of DNA that contains a particular gene (or genes) that hold the desired traits. Afterward, this DNA fragment is inserted into another organism's DNA, forming what we call recombinant DNA. This enables the host organism to now carry the desired traits and express them. An example might include the alteration of bacterial DNA to produce insulin , a crucial protein for managing blood sugar levels in humans.
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The best description of genetic engineering is the process where fragments of DNA containing desired genes are isolated to create recombinant DNA for use in a host organism. This involves isolating specific DNA segments, forming recombinant DNA, inserting it into a host, and expressing new traits. Genetic engineering has important applications in many fields, including agriculture and medicine.
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