SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A plasmid is used to replace a faulty gene in a human cell.
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A chain of bacterial amino acids is inserted into human DNA.
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A human gene is inserted into a bacterial plasmid.
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A mutation is produced in a bacterial cell.
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Detailed explanation-1: -In a typical cloning experiment, a target gene is inserted into a circular piece of DNA called a plasmid. The plasmid is introduced into bacteria via a process called transformation, and bacteria carrying the plasmid are selected using antibiotics.
Detailed explanation-2: -The entire human genome–all the genes in a human–can be cut into small pieces. These pieces can be inserted into plasmids that are then inserted into bacteria. Each bacterial cell contains one piece of human DNA and can be grown into a colony of many bacteria that contain the same piece of DNA.
Detailed explanation-3: -Recombinant DNA is a technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory.