The termination of a cell signal is most likely caused by protein kinases. The correct option is c.
What is cell signaling?
Cell signaling is a process of transfer of signal or any information from the cell surface to the cytosol and then to the nucleus which leads to a gene expression.
Termination is the last process, in which those signals or sequences have been transferred, that stops the process of transcription or translation. When a process is completed, termination codons are given to stop the process.
Protein kinase is the substance that transfers the phosphate group to other proteins to change their structure. They help in energy metabolic processes and cell cycling processes.
Thus, the correct option is c. protein kinases.
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