Cell Cycle and Mitosis

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During which phase of the cell cycle is DNA replicated?

G1 phase

M phase

S phase (correct)

G2 phase

In which phase of the cell cycle do some cells remain nonproliferative but viable and functional?

G1 phase

M phase

S phase

Go phase (correct)

Which phase of the cell cycle is known for active RNA and protein synthesis?

G2 phase

G1 phase (correct)

M phase

Go phase

Which phase of the cell cycle has the highest variability in duration, leading to the overall variability of cell cycle times?

G1 phase Signup and view all the answers

In which phase of the cell cycle are chromosomes duplicated to become tetraploid?

S phase Signup and view all the answers

Which family of proteins governs the transition of a cell from one phase to another in the cell cycle?

Cyclins Signup and view all the answers

What initiates the cell cycle?

Growth factor receptor Signup and view all the answers

Which complex catalyzes the phosphorylation of the retinoblastoma (Rb) protein?

Cyclin D-CDK4/CDK6 Signup and view all the answers

Which complex forms in late G1 and is necessary for the progression from G1 to S phase in the cell cycle?

Cyclin E & CDK2 Signup and view all the answers

What becomes active once separated from the dephosphorylated Rb protein in the cell cycle?

E2F Signup and view all the answers

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

6-12 hours Signup and view all the answers

Which phase of the cell cycle is characterized by the active synthesis of RNA and proteins?

G1 phase Signup and view all the answers

What represents the time spent by a cell prior to preparation for active division?

Resting phase (Go) Signup and view all the answers

In which phase of the cell cycle are chromosomes duplicated to become tetraploid?

S phase Signup and view all the answers

What is the main reason for the high variability of cell cycle times?

Variability of G1 phase Signup and view all the answers

What is the primary role of cyclin D in the cell cycle?

Forming a complex with CDK4 and CDK6 to activate E2F Signup and view all the answers

What is the function of cyclin E in the late G1 phase of the cell cycle?

Rapidly degrading to release CDK2 Signup and view all the answers

Which proteins govern the transition of a cell from one phase to another in the cell cycle?

Cyclins Signup and view all the answers

What does the binding of a growth factor to the growth factor receptor on the plasma membrane initiate in the cell cycle?

Production of cyclins Signup and view all the answers

What is the role of the retinoblastoma (Rb) protein in the cell cycle?

Separating from E2F to become active Signup and view all the answers

Cell Cycle and Mitosis

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Questions and Answers

During which phase of the cell cycle is DNA replicated?

In which phase of the cell cycle do some cells remain nonproliferative but viable and functional?

Which phase of the cell cycle is known for active RNA and protein synthesis?

Which phase of the cell cycle has the highest variability in duration, leading to the overall variability of cell cycle times?

In which phase of the cell cycle are chromosomes duplicated to become tetraploid?

Which family of proteins governs the transition of a cell from one phase to another in the cell cycle?

What initiates the cell cycle?

Which complex catalyzes the phosphorylation of the retinoblastoma (Rb) protein?

Which complex forms in late G1 and is necessary for the progression from G1 to S phase in the cell cycle?

What becomes active once separated from the dephosphorylated Rb protein in the cell cycle?

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

Which phase of the cell cycle is characterized by the active synthesis of RNA and proteins?

What represents the time spent by a cell prior to preparation for active division?

In which phase of the cell cycle are chromosomes duplicated to become tetraploid?

What is the main reason for the high variability of cell cycle times?

What is the primary role of cyclin D in the cell cycle?

What is the function of cyclin E in the late G1 phase of the cell cycle?

Which proteins govern the transition of a cell from one phase to another in the cell cycle?

What does the binding of a growth factor to the growth factor receptor on the plasma membrane initiate in the cell cycle?

What is the role of the retinoblastoma (Rb) protein in the cell cycle?

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