AP Biology Cell Cycle

What important event happens during the S-phase of the cell cycle?

• The mitotic spindle forms

• The nuclear membrane breaks down

• DNA replication

• Sister chromatids separate

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NGSS.HS-LS1-4

Which of the following describes anaphase?

• Chromatin condenses into chromosomes, and the nuclear membrane is broken down

• Sister chromatids are separated and kinetochores begin pulling chromosomes to opposite poles

• Spindle fibers attach to centromeres and begin moving sister chromatids towards the cell's equator

• Chromosomes decondense and two nuclei form within the cell

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NGSS.HS-LS1-4

Which phase of the cell cycle does the cell spend the greatest amount of time in?

• S phase

• Interphase

• M-phase

• Cytokinesis

Mutations in genes that regulate the cell cycle will most likely lead to what disease?

• Cancer

• Apoptosis

• Meiosis

• Diabetes

Tags

NGSS.HS-LS1-4

A(n) _____ is a stage in the eukaryotic cell cycle at which the cell examines internal and external cues and "decides" whether or not to move forward with division.

• checkpoint

• chromosome

• interphase

• tumor

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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

• 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

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NGSS.HS-LS1-4

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

  • In ​ (a)   stage of ​ (b)   , the combination signals protein synthesis

• G2

• prophase

• metaphase

• anaphase

• telophase

• mitosis

• cytokinesis

• interphase

• G1

• S

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