Final answer:
The question is about the role of cyclin-dependent kinases (Cdks) in the cell cycle. All statements provided are true, indicating the specific functions of M-Cdk, S-Cdk, and G1-Cdk in triggering cytokinesis, initiating DNA replication, and driving cells through G1 into S phase, respectively.
Step-by-step explanation:
The subject of the question is biology, specifically the regulation of the cell cycle. Cyclins and cyclin-dependent kinases (Cdks) are critical in regulating the progression through various stages of the cell cycle. Statement (a) Activated M-Cdk triggers the onset of cytokinesis is true because M-Cdk is involved in regulating mitosis, which leads to cytokinesis.
Statement (b) Activated S-Cdk initiates DNA replication is true as S-Cdk is necessary for the start of DNA synthesis during the S phase of interphase. Statement (c) G1-Cdk helps drive cells through G1 into S phase is also true since G1-Cdk is one of the molecules that regulate the G1 checkpoint and ensures the cell is prepared for DNA replication. Therefore, none of the statements provided are false; they all correctly describe the functions of various Cdks in the cell cycle.