Problemas

1. Why is the process of mitosis essential for multicellular organisms? A. It helps in producing genetic variation. B. It allows for growth and repair of tissues. C. It removes damaged cells from the body. D. It occurs only during asexual reproduction. 2. During the Sphase of interphase, which of the following occurs? A. The cell grows and performs normal functions. B. Spindle fibers begin to form. C. DNA is replicated in preparation for cell division. D. Chromosomes align at the metaphase plate. 3. If spindle fibers do not attach properly during metaphase, what is the most likely outcome? A. The cell will skip mitosis and return to interphase. B. Chromosomes may not separate evenly during anaphase. C. The cell will complete mitosis without any errors. D. Cytokinesis will occur before chromosomes align. 4. What is the primary function of chromosomes during mitosis? A. To produce energy for the cell. B. To store nutrients for cell growth. C. To ensure DNA is accurately distributed to daughter cells. D. To generate new spindle fibers for division. 5. Why is it crucial for chromosomes to line up at the metaphase plate before the cell divides? A. It helps the nuclear envelope reform before cytokinesis. B. It ensures that each daughter cell will receive a complete set of chromosomes. C. It prevents the formation of new centromeres. D. It stops the cell from entering prophase too early. 6. What would most likely happen if the DNA replication step in the S phase is skipped? A. The cell will proceed to mitosis but produce abnormal cells. B. The cell will grow larger than usual to compensate. C. Mitosis will not be initiated, and the cell will remain in G1. D. The spindle fibers will separate the chromatids more effectively. 7.What is the significance of chromatin condensing into visible chromosomes during prophase? A. It marks the end of DNA replication. B. It makes it easier for the cell to separate the DNA equally. C. It signals the start of cytokinesis. D. It helps the nuclear envelope disassemble. 8. How could disruptions in mitosis potentially lead to diseases like cancer? A. The cell may undergo uncontrolled division due to errors in spindle fiber formation. B. The cell may stop dividing entirely, leading to tissue damage. C. The chromosomes may remain uncondensed, preventing cell growth. D. The nuclear envelope may reform too early,halting the process of division.
Solución
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1. B. It allows for growth and repair of tissues.<br />2. C. DNA is replicated in preparation for cell division.<br />3. B. Chromosomes may not separate evenly during anaphase.<br />4. C. To ensure DNA is accurately distributed to daughter cells.<br />5. B. It ensures that each daughter cell will receive a complete set of chromosomes.<br />6. C. Mitosis will not be initiated, and the cell will remain in G1.<br />7. B. It makes it easier for the cell to separate the DNA equally.<br />8. A. The cell may undergo uncontrolled division due to errors in spindle fiber formation.
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