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Teminism is concerned with ____ activity.

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Important Questions on Molecular Basis of Inheritance

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The given diagram represents a transcription unit in DNA. Which of the following statements correctly describes the transcription unit?

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Read the following statements with respect to transcription.

A. There is a single RNA polymerase enzyme that catalyzes the transcription of all types of RNA in prokaryotes.

B. Termination is controlled by σ factor.

C. In eukaryotes, the polycistronic genes have interrupted coding sequences.

D. Additional regulatory sequence may be present further upstream or downstream to the promoter.

The correct statement is/are:

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What would happen if a gene encoding a polypeptide of 50 amino acids undergoes nonsense mutation at the 25th codon, i.e., UAC into UAA?