20 Questions
What is the purpose of the G1 phase in the cell cycle?
Cell growth and accumulation of DNA replication materials
What is the function of the M checkpoint in the cell cycle?
To determine if all sister chromatids are correctly attached to the spindle microtubules
What activates or deactivates other proteins by phosphorylation in cells?
Protein kinases
What must be bound to a cyclin to activate and is involved in regulating the cell cycle?
Cyclin-dependent kinase (CDK)
Which checkpoint ensures that DNA replications occurs without any problem?
S checkpoint
Which stage of the cell cycle is characterized by the replication of DNA?
S phase
In which phase does the cell spend most of its time?
G1 phase
Which statement accurately describes the differences between cell division in prokaryotic and eukaryotic cells?
Prokaryotic cells lack a nucleus, so their division does not involve mitosis, unlike eukaryotic cells.
Which stage of the cell cycle precedes mitosis and is characterized by continued growth and preparation for cell division?
G2 phase
What is the correct sequence of the stages in the cell cycle?
G1 phase—S phase—G2 phase—M phase
What regulates the cell cycle on a molecular level and is called the cell cycle control system?
Cell Checkpoints
Which phase of the cell cycle ensures that DNA replication occurs without any problem?
S Phase
What are enzymes that activate or deactivate other proteins by phosphorylation known as?
Protein Kinases
Which checkpoint determines whether all conditions are favorable for cell division, including cell growth, nutrients, and DNA damage?
G1 Checkpoint
What is the resting phase in which the cell neither divides nor prepares to divide known as?
G0 Phase
What is the primary purpose of the M checkpoint in the cell cycle?
To ensure that the DNA has been accurately replicated before proceeding to mitosis
Which phase of the cell cycle precedes mitosis and involves the replication of DNA?
S phase
What is the primary role of cyclins in regulating the cell cycle?
Activating CDKs to promote progress through the cell cycle
What characterizes the G1 phase of the cell cycle?
Preparation for DNA replication and cell growth
Which event takes place during the G2 phase of the cell cycle?
Preparation for mitosis and further growth
Test your knowledge of general biology concepts with this review quiz. Determine whether statements about cell division, interphase, and other biological processes are correct or wrong.
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