Cell Division Lesson Info
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ASSESSMENT QUESTIONS:
COLLIN SAYLOR Q1 Q2 Q3 Q4 Q5 SCORE
Your Results saved for class Bell 3 Science 5/5
Questions & Answers
Place the four images from the cell cycle in the correct chronological order.
four magnified cells
A. Image A, image D, image B, image C
B. Image C, image D, image B, image A
C. Image C, image B, image A, image D
D. Image B, image C, image D, image A
Correct Answer: C. Image C, image B, image A, image D
Explanation: Image C shows the cell in interphase. The cell's DNA is in the form of chromatin. Image B shows the cell in prophase. The chromosomes have thickened and can be seen individually. Outside the nucleus, spindle fiber is beginning to form between the centrioles. Image A shows the cell in metaphase. The chromosomes have lined up along the equator of the cell and are attached to spindle fibers at their centromere. Image D shows the cell in anaphase. The individual chromatids have been drawn apart to opposite poles of the cell. This is just before the cell begins to split into two identical cells.
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During which phase does the cell actually separate into two individual daughter cells?
A. Prophase
B. Cytokinesis
C. Interphase
D. Metaphase
Correct Answer: B. Cytokinesis
Explanation: Cytokinesis is the phase during which the cytoplasm of the cell divides and the cell actually separates into two cells. The term cytokinesis actually means cutting (kinesis) of the cytoplasm.
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If your were to examine a sample of 1000 cells, in which of the phases listed below would you expect to find most of the cells?
A. Interphase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: A. Interphase
Explanation: Most cells spend about 90% of their life cycle in interphase. Therefore, if you were to examine a random sample of cells, most of them would be found to be in interphase.
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Upon examining a sample consisting of 100 cells, you find the following distribution of cell phases. If you know that the cell cycle for this type of cell takes two hours, how long, on average, does the cell spend in prophase?
table of cell phase data
A. 8 minutes
B. 16 minutes
C. 22 minutes
D. 30 minutes
Correct Answer: D. 30 minutes
Explanation: There are 100 cells and 25 of them, or 1/4 of the entire sample, are in prophase. From this you can conclude that these cells spend 1/4 of their cell cycle in prophase. The length of the cell cycle for these cells is 2 hours, or 120 minutes. Therefore, the cells spend about 30 minutes in prophase.
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In what part of the cell cycle does the DNA make a copy of itself?
A. Interphase
B. Prophase
C. Telophase
D. Cytokinesis
Correct Answer: A. Interphase
Explanation: The replication of DNA occurs during interphase. Arguably, the replication of DNA is the most important step in the cell cycle, as it allows the cell to pass on a full copy of its DNA to each daughter cell. If this step did not occur, each daughter cell would only receive a portion of the parent DNA.
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