Biology Practice: Cell Cycle & Division (Mock Test 4 - Expert Experimental & Clinical Logic)
1. In a laboratory, a cell is treated with "Colchicine," a drug that inhibits the formation of spindle fibers. At which stage will the cell cycle be arrested?
2. A researcher observes 46 chromosomes in a human skin cell just before it enters the S-phase. How many "Chromatids" will be present in the cell during Metaphase?
3. If a diploid cell has $2n = 12$ chromosomes, how many chromosomes will be present in each daughter cell after Meiosis I?
4. A slide shows cells where the nuclear membrane is disappearing and centrioles are moving apart. However, no "Asters" are visible. This indicates the slide is of:
5. Cancer is clinically defined as a disease where the cell cycle control is lost, leading to:
6. If the DNA content of a diploid cell in G1 phase is $2C$, what will be the DNA content at the end of the G2 phase?
7. A microscope slide shows chromosomes being pulled toward opposite poles with the centromere leading the way. The stage is:
8. In a clinical study of "Down Syndrome," an extra chromosome is found in cells. This is usually the result of an error in:
9. If a cell skips the G1 checkpoint and enters S-phase prematurely, what is the most likely experimental outcome?
10. To calculate the number of mitotic divisions required to produce 128 cells from a single parent cell, the formula is:
11. A tissue sample shows a "Cell Plate" forming. Is this tissue from a human or a hibiscus plant?
12. Why do we often use "Onion Root Tips" to study Mitosis in the lab?
13. During an experiment, Meiosis is blocked at Prophase I. Which process will definitely NOT occur?
14. If a human zygote ($2n=46$) undergoes Mitosis, how many chromosomes will be in the resulting embryo cells?
15. Clinically, why is Meiosis referred to as "Reductional" division?
16. What would be the chromosomal condition of a gamete if Meiosis occurs without Cytokinesis?
17. A karyotype shows 23 pairs of chromosomes. This indicates the cell is:
18. During the "G0" phase, nerve cells are metabolically:
19. In a lab, a cell is found with two nuclei. This suggests that ______ has occurred, but ______ has not.
20. Which observation confirms that an experiment involves "Meiosis II" and not "Mitosis"?