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Which of the following promoter is having high tissue specificity?

(a) 35S promoter

(b) nos promoter

(c) 35S & nos promoters are having high specificity

(d) neither of the promoter is having high specificity

The question was posed to me in an interview for job.

The question is from Vascular Plants in chapter Using Other Organisms of Genetic Engineering

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The correct answer is (d) neither of the promoter is having high specificity

To explain I would say: Both the promoters, 35S and CaMV are having low tissue specificity. Tissue specificity can be achieved by insertion of sequences from other promoters.

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