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What is true about selectable marker- 
  • a)
    It is always an antibiotic resistance gene
  • b)
    It help to select transformants from non-transformants  
  • c)
    A plasmid without selectable marker will not multiply frequently
  • d)
    gene encoding B-galactosidase never be also a selectable marker
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
What is true about selectable marker-a)It is always an antibiotic resi...
Selectable marker genes are conditionally dominant genes that confer an ability to grow in the presence of applied selective agents.Selectable markers are often but not always antibiotic resistance genes. They help in artificial selection. They help in identifying transformants and selectively allowing their growth whereas eliminating non-transformants in cloning vector.so, option b is correct.
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What is true about selectable marker-a)It is always an antibiotic resistance geneb)It help to select transformants from non-transformantsc)A plasmid without selectable marker will not multiply frequentlyd)gene encoding B-galactosidase never be also a selectable markerCorrect answer is option 'B'. Can you explain this answer?
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