The following statement is true about a suppressor gene mutation to induce cell
ID: 300134 • Letter: T
Question
The following statement is true about a suppressor gene mutation to induce cell division of a mammalian cell: proto-oncogene product must have decreased activity. tumor suppressor gene product must lose activity. tumor suppressor gene product have an increased activity. tumor suppressor gene product lose ability to express mRNA. Incidence of cancer in human increases with age suggesting that: cancer is an infectious disease. multiple mutations are required to develop cancer. cancer gene(s) cannot acquired in lifetime. none of the above are Plasmids are important in biotechnology because they are: a vehicle for the insertion of foreign genes into bacteria. recognition sites on recombinant DNA strands. surfaces for protein synthesis in eukaryotic recombinants. surfaces for respiratory processes in bacteria. proviruses incorporated into the host DNA. What is the enzymatic function of restriction enzymes? to add new nucleotides to the growing strand of DNA to join nucleotides during replication to join nucleotides during transcription to cleave nucleic acids at specific sites to repair breaks in sugar-phosphate backbones What is a cloning vector? an enzyme that cuts DNA into restriction fragments a DNA probe used to locate a particular gene in the genome an agent, such as a plasmid, used to transfer DNA from an in vitro solution into a living cell the laboratory apparatus used to clone genes the sticky end of a DNA fragment Bacteria containing recombinant plasmids are often identified by which process? examining the cells with an electron microscope using radioactive tracers to locate the plasmids exposing the bacteria to an antibiotic that kills cells lacking the plasmid removing the DNA of all cells in a culture to see which cells have plasmids producing antibodies specific for each bacterium containing a recombinant plasmidExplanation / Answer
16. D.Protooncogene must lose ability to express mRNA.
17.B. Multiple mutations are accumulated by the old age and cells do not remain optimum fit for the surroundings.
18.A. Plasmid is a small DNA inside a cell that can replicate independently.
19.D. To cleave nucleic acids at specific sites. It is also known as biological scissors.
20.C.Cloning vector is a small piece of DNA taken from a plasmid or bacteria cell and can be incorporated into another cell.
21.C. By exposing them to antibiotic that kills bacteria lacking plasmids.