cell cycle

During this phase, cellular growth occurs (synthesis

of

lipids and proteins)

• Mitosis

• G₁ phase

• S phase

• G₂ phase

Consists of three sub-phases

• G1 phase

• Interphase

• Mitosis

• S phase

G₁ usually lasts 12 hours, but in some cells (nerve or

muscle cells) G₁ can last much longer such that the cell

appears to have been halted in the cycle. These cells

are said to be in the ... phase.

• G₂

• M

• S

• G₀

During this phase, chromosomal replication

occurs and

mitochondria and centrioles divide

• Mitosis

• G₁ phase

• S phase

• G₂ phase

Period of time after the G₂ phase of interphase

• Mitosis

• G₁ phase

• S phase

• G₂ phase

Levels of these proteins

remain steady throughout the cell cycle.

These proteins are inactive at

baseline.

• Cyclin-dependent kinases (CDKs)

• Cyclins

• Cyclin-CDK complex

• CDK inhibitors

******** are in a constant cycle of synthesis and degradation with resulting peaks and lows of levels.

The concentration of a particular ******** is related to the cell cycle phase.

• Cyclin-dependent kinases (CDKs)

• Cyclins

• Cyclin-CDK complex

• CDK inhibitors

************** forms a maturation-promoting factor (MPF).

• Cyclin-dependent kinases (CDKs)

• Cyclins

• Cyclin-CDK complex

• CDK inhibitors

********** halting the cell

cycle.

*********** are often activated in response to environmental

signals or by molecular signals associated with damaged DNA.

• Cyclin-dependent kinases (CDKs)

• Cyclins

• Cyclin-CDK complex

• CDK inhibitors

Select the correct sequence of phases of mitosis:

• anaphase, telophase, prophase, metaphase

• prophase, anaphase, metaphase, telophase

• metaphase, prophase, anaphase, telophase

• prophase, metaphase, anaphase, telophase