The recombinant DNA is ....

Варианты ответов и условие задания

1. the sequence of bases in DNA that determines the sequence of amino acids in a protein
2. the parts of DNA from two sources that have been combined in vitro and transferred to cells where their information can be expressed
3. the segments of DNA which are placed into a rapidly multiplying cell that quickly produces many copies of the gene
4. the segments of DNA that consist of large amounts of the gene product or many copies of the gene itself