Ch 12 Biology
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
Correct Answer
A. Mitotic phase -
- 2.
During ________ the cell grows and replicates both its organelles and its chromosomes
- A.
Cytokinesis
- B.
S
- C.
Mitosis
- D.
Interphase
- E.
G1
Correct Answer
D. Interphase -
- 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
Correct Answer
C. The nuclear envelope disintegrates -
- 4.
True or False? Mitosis takes place during the M phase, which is the longest phase of the cell cycle.
- A.
True
- B.
False
Correct Answer
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
Correct Answer
C. Sister Chromatid -
- 6.
During which stage of mitosis are chromosome slined up in the center of the cell
- A.
Anaphase
- B.
Telophase
- C.
Metaphase
- D.
Prophase
Correct Answer
C. Metaphase -
- 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
Correct Answer
C. Telophase -
- 8.
To which part of the centromere do mitotic spindle fibers attach during prometaphase
- A.
Microtubule
- B.
Kinetochore
- C.
Chromosome
- D.
Centriole
Correct Answer
B. Kinetochore -
- 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
Correct Answer
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
Correct Answer
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
Correct Answer
A. S pahse -
- 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.
Correct Answer
A. The cells get smaller with each generation -
- 13.
True or false? The M phase is characterized by the replication and division of a cell's chromosomes.
- A.
True
- B.
False
Correct Answer
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
Correct Answer
A. 34 -
- 15.
Which of the following events would cause the cell cycle to arrest?
- 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
Correct Answer
D. Poor nutrient conditions -
- 16.
Nucleoli are present during _____.
- A.
Interphase
- B.
Metaphase
- C.
Prophase
- D.
Prometaphse
- E.
Anaphase
Correct Answer
A. Interphase -
- 17.
Cytokinesis often, but not always, accompanies _____.
- A.
Metaphase
- B.
Prometaphase
- C.
Telephase
- D.
Interphase
- E.
Anaphase
Correct Answer
C. Telephase -
- 18.
Chromosomes become visible during _____.
- A.
Interphase
- B.
Metaphase
- C.
Prometaphase
- D.
Prophase
- E.
Anaphase
Correct Answer
D. Prophase -
- 19.
Centromeres divide and sister chromosomes become full-fledged chromosomes during _____.
- A.
Telopohase
- B.
Anaphase
- C.
Metaphase
- D.
Prometaphase
- E.
Interphase
Correct Answer
B. Anaphase -
- 20.
Spindle fibers attach to kinetochores during _____.
- A.
Interphase
- B.
Anaphase
- C.
Metaphase
- D.
Telophase
- E.
Prometaphase
Correct Answer
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
Correct Answer
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
Correct Answer
D. Anaphase -
- 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
Correct Answer
B. Cytokinesis as it occurs in animal cells -
- 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
Correct Answer
D. Prophase -
- 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
Correct Answer
A. Metaphase -
- 26.
Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1215q.swf this illustrates the events of ________.
- A.
Cytokinesis as it occurs in plant cells
- B.
Interphase
- C.
Metaphase
- D.
Prometaphase
- E.
Anaphase
Correct Answer
D. Prometaphase -
- 27.
Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1216q.swf this illustrates the events of _________.
- A.
Metaphase
- B.
Prometaphase
- C.
Anaphase
- D.
Prophase
- E.
Cytokinesis as it occurs in plant cells
Correct Answer
E. Cytokinesis as it occurs in plant cells -
- 28.
Http://media.pearsoncmg.com/bc/bc_campbell_biology_8/img/activities_quizzes/1217q.swf this illustrates the events of ________.
- A.
Telophase
- B.
Metaphase
- C.
Prophase
- D.
Anaphase
- E.
Prometaphase
Correct Answer
A. Telophase -
- 29.
Which of the following is a function of meiosis but not mitosis in eukaryotes?
- A.
Production of animal gametes
- B.
Repair of damaged organs
- C.
Cell replacement
- D.
Asexual reproduction
- E.
Growth
Correct Answer
A. Production of animal gametes -
- 30.
A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain
- A.
92
- B.
23
- C.
46
- D.
23 or 46, depending on the portion of prophase examined
- E.
46 or 92, depending on the portion of prophase examined
Correct Answer
A. 92 -
- 31.
It is difficult to observe individual chromosomes with a light microscope during interphase because _____.
- A.
They leave the nucleus and are dispersed to other parts of the cell
- B.
Sister chromatids do not pair up until division starts
- C.
The DNA has not been replicated yet
- D.
They have uncoiled to form long, thin strands
- E.
The spindle must move them to the metaphase plate before they become visible
Correct Answer
D. They have uncoiled to form long, thin strands -
- 32.
The kinetochores _____.
- A.
Of each spindle interdigitate at the cell's equator and then move apart, causing the cell to elongate
- B.
Are the primary centromere structures that maintain the attachment of the sister chromatids prior to mitosis
- C.
Attach to the ring of actin along the cytoplasmic surface of the plasma membrane, causing the actin to contract to form the cleavage furrow
- D.
Are sites at which microtubules attach to chromosomes
- E.
Are located at the center of the centrosome; their function is to organize tubulin into elongated bundles called spindle fibers
Correct Answer
D. Are sites at which microtubules attach to chromosomes -
- 33.
Which of the following correctly matches a phase of the cell cycle with its description?
- A.
S: immediately precedes cell division
- B.
G2: cell division
- C.
M: duplication of DNA
- D.
G1: follows cell division
- E.
All of the above are correctly matched.
Correct Answer
D. G1: follows cell division -
- 34.
In some organisms such as certain fungi and algae, cells undergo the cell cycle repeatedly without subsequently undergoing cytokinesis. What would result from this?
- A.
Inability to duplicate DNA
- B.
Large cells containing many nuclei
- C.
Division of the organism into many cells, most lacking nuclei
- D.
A decrease in chromosome number
- E.
A rapid rate of gamete production
Correct Answer
B. Large cells containing many nuclei -
- 35.
Which of the following is/are difference(s) between the fission of a bacterium and mitosis in human cells?
- A.
Duplicated bacterial chromosomes attach to the plasma membrane. Duplicated human chromosomes are attached to each other.
- B.
Bacteria are smaller and simpler than human cells.
- C.
Human chromosomes are larger and more complex.
- D.
A bacterium has only one chromosome, human chromosomes are paired.
- E.
All of the above are differences between the fission of a bacterium and human cell division.
Correct Answer
E. All of the above are differences between the fission of a bacterium and human cell division. -
- 36.
Cytochalasin B is a chemical that disrupts microfilament formation. This chemical would interfere with _____.
- A.
Formation of the mitotic spindle
- B.
Binary fission
- C.
Cleavage
- D.
Formation of the cell plate
- E.
DNA replication
Correct Answer
C. Cleavage -
- 37.
Cells will usually divide if they receive the proper signal at a checkpoint in the _____ phase of the cell cycle
- A.
Cytokinesis
- B.
M
- C.
G2
- D.
G1
- E.
S
Correct Answer
D. G1 -
- 38.
A benign tumor, but not a malignant tumor, is one in which the cancerous cells _____.
- A.
Have an unusual number of chromosomes
- B.
Migrate from the initial site of transformation to other organs or tissues
- C.
Remain confined to their original site
- D.
Are the result of the transformation of normal cells
- E.
Can divide indefinitely if an adequate supply of nutrients is available
Correct Answer
C. Remain confined to their original site -
- 39.
Which of these is NOT a carcinogen?
- A.
UV light
- B.
Testosterone
- C.
Cigarette smoke
- D.
Fat
- E.
All of the above are carcinogens
Correct Answer
E. All of the above are carcinogens -
- 40.
_____ is a carcinogen that promotes colon cancer.
- A.
Fat
- B.
UV light
- C.
Estrogen
- D.
A virus
- E.
Testosterone
Correct Answer
A. Fat -
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