#1
Which phase of the cell cycle involves DNA replication?
G1 phase
S phase
G2 phase
M phase
#2
What is the purpose of the G1 phase in the cell cycle?
Cell growth and preparation for DNA replication
DNA replication
Mitosis
Cell division
#3
Which phase of the cell cycle follows the G2 phase?
G1 phase
S phase
M phase
Interphase
#4
What is the role of tumor suppressor genes in the cell cycle?
Promote cell division
Inhibit cell division
Initiate DNA replication
Prevent apoptosis
#5
Which enzyme is responsible for adding phosphate groups to cyclin-dependent kinases (CDKs) in the cell cycle?
Phosphatase
Kinase
Cyclin
CDK-activating kinase (CAK)
#6
Which checkpoint ensures that the cell's DNA is undamaged before entering the S phase?
G1 checkpoint
G2 checkpoint
M checkpoint
S checkpoint
#7
What is the role of cyclins and cyclin-dependent kinases (CDKs) in the cell cycle regulation?
They promote cell division by activating cyclin inhibitors
They prevent cell division by inhibiting cyclin inhibitors
They promote cell division by activating cyclin-CDK complexes
They prevent cell division by inactivating cyclin-CDK complexes
#8
During which phase of the cell cycle does the cell prepare for cell division?
G1 phase
S phase
G2 phase
M phase
#9
What is the function of the anaphase-promoting complex (APC/C) in the cell cycle?
Initiates DNA replication
Promotes sister chromatid separation
Activates cyclin-CDK complexes
Prevents apoptosis
#10
During which phase of the cell cycle does the cell replicate its DNA?
G1 phase
S phase
G2 phase
M phase
#11
What happens during the M phase of the cell cycle?
Cell growth and preparation for DNA replication
DNA replication
Mitosis and cytokinesis
Cell division
#12
What is the purpose of cytokinesis in the cell cycle?
Ensure proper alignment of chromosomes
Separate sister chromatids
Divide the cytoplasm and organelles
Initiate cell growth
#13
What is the role of the spindle apparatus during mitosis?
Separate sister chromatids
Initiate DNA replication
Activate cyclin-CDK complexes
Promote cytokinesis
#14
During which phase of the cell cycle does the nuclear envelope break down?
Prophase
Metaphase
Anaphase
Telophase
#15
Which phase of the cell cycle involves the dissolution of the nuclear envelope?
Prophase
Metaphase
Anaphase
Telophase