Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.

TLS Online TPP Program

#Question id: 3922

#XL - Q Biochemistry

The σ70 subunit in E. coli RNA polymerase acts as a/an __.

TLS Online TPP Program

#Question id: 3923

#XL - Q Biochemistry

The transcription of __ RNA accounts for most of the transcriptional activity of a cell.

TLS Online TPP Program

#Question id: 3924

#XL - Q Biochemistry

Characteristics of ligands involved in transcription include:

TLS Online TPP Program

#Question id: 3925

#XL - Q Biochemistry

Constitutive genes

TLS Online TPP Program

#Question id: 3926

#XL - Q Biochemistry

Positive regulation of a gene requires __.

TLS Online TPP Program

#Question id: 3927

#XL - Q Biochemistry

An operon is __