Final answer:
The base sequences of all the RNAs a cell produces under certain conditions are known as the transcriptome, which is studied in the field of transcriptomics.
Step-by-step explanation:
The base sequences of all the RNAs that a cell produces under a particular set of conditions is known as the transcriptome. The transcriptome is the entire collection of mRNA molecules expressed by a cell, which changes depending on various conditions such as developmental stage, environmental factors, and disease state. Studying the transcriptome, often referred to as transcriptomics, allows scientists to understand which genes are active and how they respond to different conditions. It is distinct from the genome, which is the complete set of genetic material in a cell, and the proteome, which is the full range of proteins a cell can produce.