Final answer:
PKA, or Protein Kinase A, adds phosphates to proteins, which can affect various cellular processes such as DNA replication and RNA stability.
Step-by-step explanation:
PKA, which stands for Protein Kinase A, adds phosphates specifically to proteins. This process is known as phosphorylation. Phosphorylation of proteins can lead to several functional changes within the cell, influencing processes such as DNA replication, cell division, pathogen recognition, RNA stability, translation, RNA shuttling, and various post-transcriptional and post-translational modifications.