Rod cells sense light with the aid of a light-sensitive GPCR called rhodopsin.

TLS Online TPP Program

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#Unit 3. Fundamental Processes

Note that there is no significant consensus among the 17–19 nucleotides that lie in the region between –35 and –10.

TLS Online TPP Program

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#Unit 3. Fundamental Processes

Nicks and gaps are good sites for RNA polymerase to bind nonspecifically

TLS Online TPP Program

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#Unit 3. Fundamental Processes

Presence of the s-subunit permitted recognition of authentic RNA polymerase binding sites

TLS Online TPP Program

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#Unit 3. Fundamental Processes

Polymerase binding sites are called promoters

TLS Online TPP Program

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#Unit 3. Fundamental Processes

Transcription that begins at promoters is specific, directed by the s-subunit

TLS Online TPP Program

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#Unit 3. Fundamental Processes

How tightly does core enzyme v. holoenzyme bind DNA?