Mitosis Cell Cycle Cell Regulation

The cell cycle is regulated by this

• cyclins

• stem cells

• cyclin-dependent kinases

• both cyclins and cyclin-dependent kinases

Tags

NGSS.HS-LS1-4

What does NOT happen during interphase?

• growth

• DNA replication 

• obtaining nutrients

• cell divison

Cells of organisms must go through cell division for?

• growth

• repair of damaged cells

• replacement of dying cells.

• All of these

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 ​ (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

Tags

NGSS.HS-LS1-4

What triggers the cell to move from G2 phase to mitosis?

• Completion of DNA replication

• Alignment of chromosomes at the cell's equator

• Separation of sister chromatids

• Formation of the spindle fibers

Tags

NGSS.HS-LS1-4

What is the significance of checkpoints in the cell cycle?

• They ensure that cells divide uncontrollably

• They prevent the division of damaged or incomplete DNA

• They speed up cell division

• They have no significant role

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

Which of the following occurs during the G1 phase of Interphase?

• DNA replication

• Chromosome segregation

• Cell growth and normal functions

• Preparation for mitosis