Question
Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells).
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Both sense and anti-sense RNA
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A particular hormone
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An antifeedant
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A toxic protein
Solution
A.
Both sense and anti-sense RNA
Antisense RNA can be produced by inverting a cDNA copy of an mRNA with respect to the promoter in an expression vector. This yields a full length complementary copy of mRNA sequence. Antisense RNA molecule are thought to interact with mRNA molecule by base pairing to form double stranded RNA.
