General Biology 1 Review Quiz

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What is the purpose of the G1 phase in the cell cycle?

DNA synthesis and replication

Centrosome duplication and energy replenishment

Preparation for mitosis and cytokinesis

Cell growth and accumulation of DNA replication materials (correct)

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 (correct)

To regulate the cell cycle on a molecular level

To ensure favorable conditions for cell division

To examine if DNA replication occurs without any problem

What activates or deactivates other proteins by phosphorylation in cells?

DNA replication

Protein kinases (correct)

Cyclins

Centrosomes

What must be bound to a cyclin to activate and is involved in regulating the cell cycle?

Cyclin-dependent kinase (CDK) Signup and view all the answers

Which checkpoint ensures that DNA replications occurs without any problem?

S checkpoint Signup and view all the answers

Which stage of the cell cycle is characterized by the replication of DNA?

S phase Signup and view all the answers

In which phase does the cell spend most of its time?

G1 phase Signup and view all the answers

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. Signup and view all the answers

Which stage of the cell cycle precedes mitosis and is characterized by continued growth and preparation for cell division?

G2 phase Signup and view all the answers

What is the correct sequence of the stages in the cell cycle?

G1 phase—S phase—G2 phase—M phase Signup and view all the answers

What regulates the cell cycle on a molecular level and is called the cell cycle control system?

Cell Checkpoints Signup and view all the answers

Which phase of the cell cycle ensures that DNA replication occurs without any problem?

S Phase Signup and view all the answers

What are enzymes that activate or deactivate other proteins by phosphorylation known as?

Protein Kinases Signup and view all the answers

Which checkpoint determines whether all conditions are favorable for cell division, including cell growth, nutrients, and DNA damage?

G1 Checkpoint Signup and view all the answers

What is the resting phase in which the cell neither divides nor prepares to divide known as?

G0 Phase Signup and view all the answers

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 Signup and view all the answers

Which phase of the cell cycle precedes mitosis and involves the replication of DNA?

S phase Signup and view all the answers

What is the primary role of cyclins in regulating the cell cycle?

Activating CDKs to promote progress through the cell cycle Signup and view all the answers

What characterizes the G1 phase of the cell cycle?

Preparation for DNA replication and cell growth Signup and view all the answers

Which event takes place during the G2 phase of the cell cycle?

Preparation for mitosis and further growth Signup and view all the answers