What does the term "molecular cloning" refer to?

What does the term "molecular cloning" refer to?

• A. The technique for isolating specific proteins
• B. The process of making multiple copies of a specific DNA sequence
• C. A method for extracting proteins from cells
• D. A technique for introducing mutations in DNA

Answer: (B)

The term "molecular cloning" specifically refers to the process of making multiple copies of a specific DNA sequence. This involves the isolation of a DNA fragment, which is then inserted into a vector (such as a plasmid) that can replicate within a host cell. Once inside the host, the vector replicates along with the inserted DNA, resulting in a significant number of copies of that specific sequence. This process is fundamental in biotechnology for various applications, including gene expression studies, the production of recombinant proteins, and the creation of genetically modified organisms. The focus of molecular cloning on duplicating DNA sequences distinguishes it from other techniques in biotechnology, which may address protein isolation, mutation introduction, or extracting proteins from cells but do not encompass the specific DNA replication process that defines molecular cloning.

The term "molecular cloning" specifically refers to the process of making multiple copies of a specific DNA sequence. This involves the isolation of a DNA fragment, which is then inserted into a vector (such as a plasmid) that can replicate within a host cell. Once inside the host, the vector replicates along with the inserted DNA, resulting in a significant number of copies of that specific sequence. This process is fundamental in biotechnology for various applications, including gene expression studies, the production of recombinant proteins, and the creation of genetically modified organisms.

The focus of molecular cloning on duplicating DNA sequences distinguishes it from other techniques in biotechnology, which may address protein isolation, mutation introduction, or extracting proteins from cells but do not encompass the specific DNA replication process that defines molecular cloning.