PLEASE ANSWER 19-26 PLEASE What is the function and origin of restriction endonu
ID: 96233 • Letter: P
Question
PLEASE ANSWER 19-26 PLEASE What is the function and origin of restriction endonucleases A. They are part of DNA repair mechanisms in eukaryotic cells B. They are a defense mechanism against viruses in bacteria C. They are replication enzymes of yeast D. They are transposable elements of E. They are involved it proteolysis in bacteria The Holliday model is used to explain which of the following A. Recombination between homologous chromosomes B. Recombination between sister chromatids C. The creation of harlequin chromosomes D. The action of transposons E. None of the answers are correct Which of the following is correct regarding the first cloning experiment? A. It utilized the EcoRI restriction enzyme B. The vector was a plasmid called pSC101 C. The vector had a selectable marker for tetracycline resistance D. The process involved the cloning of kanamycinR gene E. All of the answers are correct The first hormone to be made by recombinant bacteria was____. A. Insulin B. Glucagons C. S
Explanation / Answer
19. During DNA Repair, all the above-mentioned recombination events take place. So, the correct answer will be option E
20. During annealing step primers anneal, or attach, to the DNA template. Thus, the correct answer will be option C
21. The bacterial cell uses the restriction enzyme to cut the invading DNA of the virus at certain recognition site. Thus, the correct answer will be option B.
22. Holliday Model (Proposed by Robert Holliday) is the first molecular model of genetic exchange that occurs between homologous chromosome during recombination. Thus the correct answer will be option A.
23. All the options are correct regarding first cloning experiment. Thus, the correct answer is option E
24. Insulin is the first human hormone produced by recombinant technology by Eli lilly an American company in 1983.Thus the correct answer is option A
25. Pluripotent cells are cells that are capable of giving rise to several different cell types. Thus the correct answer is option A
26. First disease that was successfully treated by gene therapy treatment is adenosine deaminase deficiency -SCID or ADA-SCID.Thus correct answer is option C
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