Final answer:
Post-transcriptional control is the regulation of gene product levels or activity after transcription but before translation into protein. This includes RNA processing and mRNA stability, clearly distinguishing it from post-translational control, which regulates protein activity after synthesis.
Step-by-step explanation:
The control of a gene product's levels or activity after transcription but before it is translated into protein is termed post-transcriptional control. This involves various processes such as the control of RNA splicing, the rate of mRNA translation, and the degradation of mRNA.
Gene expression is a tightly regulated process that can involve epigenetic regulation, transcriptional control, and post-transcriptional mechanisms to ensure that proteins are produced at the right time and in the right amounts. Post-translational control, on the other hand, refers to the regulation of a protein's function after it has been created, for instance through the addition of functional groups or enzyme inhibition.