APFIVE Redundancy in Cell Cycle Control
A researcher applies a specific inhibitor for a particular cyclin-dependent kinase (CDK) to a cell culture but observes no delay in cell cycle progression. Assuming the inhibitor is specific for the CDK and was administered effectively, which of the following best explains this observation?
A
The concentration of the inhibitor was too low to have an effect.
B
The cells were not in the correct stage of the cell cycle for the inhibitor to work.
C
The cells might have an alternative pathway to progress the cell cycle without that specific CDK.
D
The inhibitor was not specific to CDKs and affected other proteins.
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