Question

13. The promoter mutations, lacP A. Are recessive B. Are cis dominant C. Cannot be complemented D. Cause constitutive expression of the lac operon E. A and D F. B and C 14. The nucleotide sequence of the attenuator region A. Contains features of a termination site 8. Triggers degradation of RNA transcripts containing homologous sequences Interacts with the Polycomb group of transcriptional silencer proteins . Regulates lac operon transcription Is the binding site of the cAMP-CRP complex

Answer 1

13 - the promoter mutations Lacp are are cis dominant and cannot be complemented both B and C is correct option F

14 - The nucleotide sequence of the attenuator region contains the usual features of a termination site that includes a potential stem and loop configuration . A is correct