Ch 12 Biology
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Mitosis and sister chromatids. 5 phases of division.
- 1.During ________ both the contents of the nucleus and the cytoplasm are divided.
- A.
Mitotic phase
- B.
Mitosis
- C.
G2
- D.
G1
- E.
S
- 2.During ________ the cell grows and replicates both its organelles and its chromosomes
- A.
Cytokinesis
- B.
S
- C.
Mitosis
- D.
Interphase
- E.
G1
- 3.What event does NOT take place before the star of mitosis?
- A.
Organelle proliferate
- B.
DNA is replicated
- C.
The nuclear envelope disintegrates
- D.
The parent cell grows
- 4.True or False? Mitosis takes place during the M phase, which is the longest phase of the cell cycle.
- A.
True
- B.
False
- 5.Which term describes two recently replicated DNA strands that are joined together just before cell division?
- A.
Centromere
- B.
Centrosome
- C.
Sister Chromatid
- D.
Centriole
- 6.During which stage of mitosis are chromosome slined up in the center of the cell
- A.
Anaphase
- B.
Telophase
- C.
Metaphase
- D.
Prophase
- 7.Which stage of mitosis is characterized by the didintegration of mitotic spindles and the formation of the two new nuclear membranes?
- A.
Metaphase
- B.
Prophase
- C.
Telophase
- D.
Anaphase
- 8.To which part of the centromere do mitotic spindle fibers attach during prometaphase
- A.
Microtubule
- B.
Kinetochore
- C.
Chromosome
- D.
Centriole
- 9.During which substage of mitosis do sister chromatids break apart and start moving to opposite poles of the cell?
- A.
Telophase
- B.
Metaphase
- C.
Prophase
- D.
Anaphase
- 10.Which of the following is a function of the S phase in the cell cycle?
- A.
The separation of sister chromatids
- B.
The sorting of chromosomes
- C.
The synchronization of organelle division
- D.
The synthesis of sister chromatids
- 11.The copying of chromosomes occurs during which of the following phases of the cell cycle?
- A.
S pahse
- B.
G2 phase
- C.
M phase
- D.
G1 phase
- 12.For the first several divisions of early frog embryos, cells proceed directly from the M phase to the S phase and back to M without gaps. Which of the following is likely to be true about dividing cells in early frog embryos?
- A.
The cells get smaller with each generation
- B.
The cells do not divide by mitosis.
- C.
The number of chromosomes decreases with each generation
- D.
Frog embryos do not have DNA.
- 13.True or false? The M phase is characterized by the replication and division of a cell's chromosomes.
- A.
True
- B.
False
- 14.If an organism normally has 34 chromosomes, how many molecules of DNA should there be in the G1 phase of the cell cycle?
- A.
34
- B.
68
- C.
17
- D.
136
- 15.
- A.
Complete chromosome replication
- B.
Synthesis of cyclins by growth factors and activation of a cyclin-Cdk complex
- C.
Chromosomes lined up along the metaphase plate
- D.
Poor nutrient conditions
- 16.Nucleoli are present during _____.
- A.
Interphase
- B.
Metaphase
- C.
Prophase
- D.
Prometaphse
- E.
Anaphase
- 17.Cytokinesis often, but not always, accompanies _____.
- A.
Metaphase
- B.
Prometaphase
- C.
Telephase
- D.
Interphase
- E.
Anaphase
- 18.Chromosomes become visible during _____.
- A.
Interphase
- B.
Metaphase
- C.
Prometaphase
- D.
Prophase
- E.
Anaphase
- 19.Centromeres divide and sister chromosomes become full-fledged chromosomes during _____.
- A.
Telopohase
- B.
Anaphase
- C.
Metaphase
- D.
Prometaphase
- E.
Interphase
- 20.Spindle fibers attach to kinetochores during _____.
- A.
Interphase
- B.
Anaphase
- C.
Metaphase
- D.
Telophase
- E.
Prometaphase
- 21.During prophase a homologous pair of chromosomes consists of _____.
- A.
Two chromosomes and two chromatids
- B.
One chromosome and four chromatids
- C.
One chromosome and two chromatids
- D.
Four chromosomes and two chromatids
- E.
Two chromosomes and four chromatids
- 22.Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1211q.swfThis animation illustrates the events of _____.
- A.
Metaphase
- B.
Interphase
- C.
Prophase
- D.
Anaphase
- E.
Telophase
- 23.Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1212q.swfThis animation illustrates the events of _____.
- A.
Metaphase
- B.
Cytokinesis as it occurs in animal cells
- C.
Prometaphase
- D.
Cytokinesis as it occurs in plant cells
- E.
Prophase
- 24.Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1213q.swf This animation illustrates the events of _____.
- A.
Anaphase
- B.
Prometaphase
- C.
Interphase
- D.
Prophase
- E.
Telophase
- 25.Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1214q.swf this illustrates the events of ________.
- A.
Metaphase
- B.
Telophase
- C.
Prophase
- D.
Anaphase
- E.
Prometaphase
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