Summary of Cell Cycle and its Regulation

AP Biology

Review of Cell Cycle

Sample QuestionO If the S phase were eliminated from

the cell cycle, the daughter cells would(A) Have half the genetic material found

in the parent cell(B) Be genetically identical to each

other(C) Be genetically identical to the parent(D) Synthesize the missing genetic

material on their own

Sample QuestionO Select from one

of the choices that best fits the descriptionA. TelophaseB. InterphaseC. CytokinesisD. ProphaseE. Anaphase

DescriptionsO Cytokinesis during

this final stage of mitosis

O Division of cytoplasm

O Sister chromatids separate

O Genetic material replicates

Checkpoints

Sample QuestionsO After which of the following

checkpoints in the cell cycle is the cell first committed to divide?A. G2 checkpointB. M checkpointC. Interphase checkpointD. G1 checkpointE. MPF checkpoint

Maturation Promoting Factor (MPF)

O Composed of cyclin bound to a cyclin dependent protein kinaseO CDK

O constant concentrationO Active only when bound to cyclin

O CyclinO Concentration varies during the cell

cycle

Changes in Cyclin Concentration

Practice ProblemO Look at Figure 7.9 in your handout and

read through the investigationO What was the purpose of radioactive

labelingO Why would you expect more radioactive

labeling of DNA during S phaseO What were the percentages of cells in S

phase in each of three experiments provided?

O What does that suggest in terms of control of cell cycle?

Questions?????