In Escherichia coli,if $\sigma$⁷⁰is not bound to RNA polymerase core enzyme,active transcription of the gene is not occurring.

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In Escherichia coli, the sigma factor (σ) is required for the RNA polymerase core enzyme to initiate transcription by recognizing specific promoter regions on the DNA. However, the absence of σ factor bound to the RNA polymerase does not necessarily mean that active transcription of a gene is not occurring, as the core enzyme could be in the process of elongation or termination, phases which do not require the σ factor.

In Escherichia Coli,if σ\sigmaσ 70 is Not Bound to RNA Polymerase Core Enzyme,active Transcription

In Escherichia Coli,if $\sigma$ ⁷⁰is Not Bound to RNA Polymerase Core Enzyme,active Transcription