Final answer:
Modifier proteins in biology can modify multiple substrate proteins and play a crucial role in regulating cellular processes such as gene expression.
Step-by-step explanation:
In biology, there are many modifier proteins that can modify multiple substrate proteins. These modifier proteins play a crucial role in regulating various cellular processes, including gene expression and protein function. One example of a modifier protein is Ubiquitin, which can attach to multiple substrate proteins and mark them for degradation.
Another example is protein kinases, which can phosphorylate multiple substrate proteins and alter their activity and function. Phosphorylation of proteins is a common post-translational modification that can have a significant impact on gene expression by regulating the activity of transcription factors or other regulatory proteins.
In summary, there are several modifier proteins in biology that can modify multiple substrate proteins, and these modifications are essential for the proper functioning and regulation of cellular processes.