Cell Cycle Control

What is the first checkpoint of the cell cycle?

• Mitosis checkpoint

• G₁ checkpoint

• G₂ checkpoint

Cells stop growing for a period of time or permanently like nerve cells (neurons).

• Apoptosis

• Mitosis

• G0 Phase

• G1 Phase

Which of the following statements is true?

• Proto-oncogenes cause a loss of control of the cell cycle

• the products of oncogenes may inhibit the cell cycle

• tumor-suppressor-gene products inhibit the cell cycle

• a mutation in a proto-oncogene may convert it into a tumor suppresor gene

Tags

NGSS.HS-LS3-2

The checkpoints that regulate the cell cycle can fail when ____ becomes damaged.

• DNA 

• Cell Membrane

• Mitochondria

• Ribosomes

Tags

NGSS.HS-LS1-4

• Different cyclin/CDK combinations control different activities at different stages of the cell cycle:

  • In the ​ (a)   stage of ​ (b)   , the combination signals DNA replication

• G2

• S

• prophase

• metaphase

• anaphase

• telophase

• mitosis

• cytokinesis

• interphase

• G1

Tags

NGSS.HS-LS1-4

What is the role of cyclins in cell cycle regulation?

• They degrade DNA

• They promote cell division

• They prevent cell division

• They have no role in cell cycle regulation

Tags

NGSS.HS-LS1-4

• Different cyclin/CDK combinations control different activities at different stages of the cell cycle:

  • In the ​ (a)   stage of ​ (b)   , the combination signals the start of the cell cycle (and the end of it)

• G1

• G2

• S

• prophase

• metaphase

• anaphase

• telophase

• interphase

• mitosis

• cytokinesis

Tags

NGSS.HS-LS1-4

• The timing and rate of cell division is controlled by a combination of two substances: 

• proteins called​ ​ (a)   bind to enzymes called ​ (b)   during interphase and mitosis

• cyclins

• cyclin-dependent kinases (CDKs)

• carcinogens

• centromeres

• spindle fibers

• aster fibers

• centrioles

• motor proteins

• microfilaments

Tags

NGSS.HS-LS1-4

• The cell cycle has built in checkpoints that monitor the cell cycle and can stop it if something goes wrong: 

  • near the end of the​ (a)   stage of ​interphase , a checkpoint monitors for DNA damage and can stop the cycle before entering the ​ (b)   stage of interphase

• G1

• S

• G2

• Different cyclin/CDK combinations control different activities at different stages of the cell cycle:

  • In ​ (a)   of ​ (b)   , the combination signals nuclear division to start

• prophase

• metaphase

• anaphase

• telophase

• mitosis

• cytokinesis

Tags

NGSS.HS-LS1-4