Gene isolation and characterisation, gene expression, gene regulation in plants

1. A gene can be defined as:
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2. What is the primary role of a promoter region in a gene?
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3. In prokaryotes, the predominant site for control of gene expression is the ______
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4. In eukaryotes which of the following is removed from initially transcribed RNA before it is transported to the cytoplasm for translation?
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5. DNA ligase joins ______
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