Final answer:
Inducible proteins are the general term for gene products that vary in presence and concentration based on cellular conditions, reflecting their regulated nature and protein outcome.
Step-by-step explanation:
The general term given to products of genes that vary both in presence and concentration depending on time and need is inducible proteins. This term reflects the nature of the gene products—being inducible, meaning their production is initiated by certain molecules—and recognizes that the end product is a type of molecule, specifically, proteins. Proteins are constructed from amino acids and serve various critical functions within the cell, including acting as enzymes, transporters, or signaling molecules.
For example, inducible proteins can be enzymes that are synthesized in response to specific substrates or conditions within the cell. The regulation of these genes involves both structural and regulatory genes; where the structural genes determine the sequence of the protein or RNA, and regulatory genes control the expression of structural genes through operator, promoter, and repressor sites. An example can be seen in the figure where interleukin-2 and alpha-2u-globulin are mentioned as physical examples of protein gene products.