In a eukaryotic cell, how is transcription regulated? a. transcription factors bind to the tata box to move rna polymerase to the required spot. b. the lac operon blocks transcription when it acts as a repressor and this stops the rate of transcription. c. only one gene is needed so it's turned on or off at one time so proteins to turn on required genes. d. srna interferes with mrna, which prevents the binding of rna polymerase to the substrate agent.

d statement

explanation:

asfe afr dsef rfdg fghgnts fhbfgd   hdfdx

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.