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Which of the following tools of recombinant DNA technology is incorrec

Which of the following tools of recombinant DNA technology is incorrectly paired with its use?

  1. EcORI - Production of sticky ends
  2. DNA ligase - Multiplication of rDNA molecules
  3. ori-copy number
  4. Selectable marker-Identification of transformants
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Question 1
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dirouf ol pores incubating the cells with recombinant DNA to Ting nes ence such as isolation of DNA, fragmentation of DNA by cells and how on of the DNA fragment into a vector, transferring the. example. (on minant DNA into the host, culturing the host cells in a ats is able, mbinant DNA into the host, culturing the host cells in a 1 animals the (us examine each of these steps in somerial (DNA) 3 cells. A ogens in ogens in all that nucleic acid is the genetic material of all organisms these interest ant aut exception. In majority of organisms theic or DNA. In order to cut the DNA with cterium sriction enzymes, it needs to be in pure form, free from other cabranes, we have to break the cell open to release DNA along rith other macromolecules such as RNA, proteins, wysaccharides and also lipids. This can be achieved by treating te bacterial cells/plant or animal tissue with enzymes such as rsozyme (bacteria), cellulase (plant cells), chitinase (fungus). iou know that genes are located on long molecules of DNA aterwined with proteins such as histones. The RNA can be removed by treatment with ribonuclease whercas proteins can be removed by tratment with protease. Other molecules can be removed by appropriate tratments and pun? DNA ultimately precipitates out after the addition of chilled ethanol. This can be seen as collection of fine threads in the suspension (Figure 11.5).
Question 2
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gene gets 'inactivated due to insertion' of alien DNA, and helps in selection of recombinants. Selection of recombinants due to inactivation of antibiotics is a cumbersome procedure because it requires simultaneous plating on two plates having different antibioties. Therefore, aiternative selectable markers have beenbinants on the basis of their ability to produce colour in the presence of a chromogenic substrate. In this, a recombinant DNA is inserted within the coding sequence of an enzyme, -galactosidase. This results into inactivation of the gene for synthesis of this enzyme, which is referred to as insertional inactivation. The presence of a chromogenic substrate gives blue coloured colonies if the plasmid in the bacteria does not have an insert. Presence of insertresults into insertional inactivation of the these are identified as recombinant colonies. (iv) Vectors for cloning genes in plants and animals : You may be surprised to know that we have learnt the lesson of transferring genes into plants and animals from bacteria and viruses which have knoina this for ages - how to deliver genes to transform eukaryotic cells and force them to do what the bacteria or viruses want. For example, Agrobacterium tumifaciens, a pathogen of several dicot plants isable to deliver a piece of DNA known as 'T-DNA' to transform normal plant cells into a tumor and direct these tumor cells to produce the aus examine eacl chemicals required by the pathogen. Similarly, retroviruses in animals better understanding of the art of delivering genes by pathogensin their eukaryotic hosts has generated knowledge to transform thest dhat nucleic ac tools of pathogens into useful vectors for delivering genes of intera sout exception. to humans. The tumor inducing (Ti) plasmid of Agrobacteriur Mnbomucleic acidicis tumifaciens has now been modified into a cloning vector which is titimeng aymes, it more pathogenic to the plants but is still able to use the mechanisnit: to deliver genes of our interest into a variety of plants. Sinilarive retroviruses have also been disarmed and are now used to delint desirable genes into animal cells. So, once a gene or a DNA fragnerterl has been ligated into a suitable vector it is transferred into a bactei: plant or animal host (where it multiplies). 11.2.3 Competent Host (For Transformation with Recombinant DNA)
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Question Text
Which of the following tools of recombinant DNA technology is incorrectly paired with its use?
Updated OnMar 12, 2023
TopicBiotechnology
SubjectBiology
ClassClass 12
Answer Type Video solution: 1
Upvotes100
Avg. Video Duration2 min