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- Question
Bacterial cells protect their own DNA from degradation by restriction endonucleases by
Options- A. methylating the DNA at the sites that the enzyme recognizes
- B. deleting all recognition sites from the genome
- C. not producing any restriction endonucleases
- D. having anti restriction endonucleases
- Correct Answer
- methylating the DNA at the sites that the enzyme recognizes
- 1. Agrobacterium tumefaciens is
Options- A. a disease in humans that causes loss of sight
- B. a bacterium that can be used to introduce DNA into plants
- C. a fungi that is used to produce antibiotics in large amounts
- D. a disease in humans that causes loss of weight Discuss
- 2. Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using
Options- A. BACS
- B. expression vectors
- C. YACS
- D. all of these Discuss
- 3. A genomic library is
Options- A. a database where the sequence of an organism's genome is stored
- B. a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
- C. a book that describes how to isolate DNA from a particular organism
- D. a place where the information of the genetic organization of organisms are kept. Discuss
- 4. Which of the following is obtained using processed mRNA molecules as a template?
Options- A. rDNA
- B. mDNA
- C. cDNA
- D. tDNA Discuss
- 5. Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?
Options- A. DNA polymerase
- B. Restriction endonuclease
- C. DNA ligase
- D. DNA helicase Discuss
Recombinant DNA problems
Search Results
Correct Answer: a bacterium that can be used to introduce DNA into plants
Correct Answer: expression vectors
Correct Answer: a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
Correct Answer: cDNA
Correct Answer: DNA ligase
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