Concept explainers
Introduction:
The recombinant DNA technology involves isolation of genetic materials (DNA) from donor organisms (human, plant, or microorganism) and inserts them into recipient organisms after genetic manipulation. The main tools involved in the techniques are
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- Explain how electrophoresis separates DNA strands. a. How is a DNA fingerprinting test interpreted? b. Define plasmid and how plasmids can change a bacteria’s activity. c. How do we digest/cleave plasmids? Explain the role of a restriction enzyme. d. Define sticky end and blunt end and which one is useful in molecular biology.arrow_forwardWhat is a restriction endonuclease? Select one: a. It is an enzyme that cleaves at a specific nucleotide sequence. b. It restricts the movement of the DNA outside the nucleus. c. It proofreads the DNA for accidental damages and corrects any errors. d. It is an enzyme that separates the DNA double helix.arrow_forwardWhich of the following natural cellular process does PCR use to amplify a target DNA? A. Gene Expression B. DNA symthesis C. Transcription of DNA D. Translationarrow_forward
- If a restriction endonuclease recognizes and cleaves a linear piece of DNA and Circular DNA at 8 distinet places, how many pieces will result? OA Nine and Eight fragments respectively B. Both gerierate nine fragments C. Ten and nine fragments respectively Both generate eight fragmentsarrow_forwardThe restriction endonucleases used in recombinant DNA work: a. are synthesized by bacteria b. recognize sequences 14-16 bp long c. cut the DNA outside the recognition sequence d. all the above are truearrow_forwardWhy do prokaryotes produce restriction enzymes? A. Restriction enzymes are produced to enable bacteria to repair lesions in its DNA B. Restriction enzymes enable prokaryotes to assimilate genes or fragments of DNA from its environment C. Restriction enzymes excise phage DNA from prokaryotes thereby protecting them from lysis. D. Restriction enzymes help unwind DNA and facilitate DNA replication in prokaryotes E. Restriction enzymes are necessary for editing DNA during replication.arrow_forward
- Put the following tasks in the order they would occur during a DNA cloning experiment. a. using DNA ligase to seal DNA fragments into vectors b. using a probe to identify a clone in the library c. sequencing the DNA of the clone d. making a DNA library of clones e. cutting genomic DNA with restriction enzymesarrow_forwardWhich of the following cannot usually be inserted into a vector to form a recombinant DNA? A. PCR product of a eukaryotic coding sequence B. Lac operon operator region DNA sequence C. Reverse transcriptase gene D. E. coliarrow_forwardWhich of the following methods use(s) a labeled nucleic acidprobe, such as a labeled fragment of DNA?a. Site-directed mutagenesis c. Western blottingb. Northern blotting d. Both a and barrow_forward
- You have extracted a long piece of DNA from a human cell and you want to extract the gene of interest for you to clone it. Assuming that you know the sequence of the DNA what methods can youuse to amplify the gene of interest? A. antibody purification B. polymerase chain reaction C. none of the above D. ligationarrow_forwardWhich of the following is a function of a restriction endonuclease? a. It cleaves a DNA molecule at a specific site. b. It cleaves a DNA molecule at random locations. c. It removes specific codons from an mRNA molecule. d. It removes specific exons from an mRNA molecule.arrow_forwardWhich of the following would restore a gene back to its proper reading frame? A. one insertion that contained 3 nucleotides B. three insertions that contained two nucleotides each C. one deletion of 2 nucleotides and one insertion of 3 nucleotides. D. two insertions that contained one nucleotide eacharrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College