Biology Practice: Cell Cycle & Division (Mock Test 3 - Advanced Processes & Mechanisms)
1. What is the fundamental reason why DNA replication must occur during the S-phase of the cell cycle?
2. During Prophase, what mechanism leads to the visibility of chromosomes under a compound microscope?
3. Which mechanism ensures that sister chromatids separate and move to opposite poles during Anaphase?
4. Why is Meiosis II often called "Equational Division" similar to Mitosis?
5. What is the biological significance of "Crossing Over" during Meiosis I?
6. In plant cells, cytokinesis occurs centrifugally (from center to periphery). This is primarily due to:
7. How does the cell ensure that chromosomes are correctly aligned before proceeding to Anaphase?
8. Which molecule provides the "blueprint" for the sequence of nucleotides during the S-phase?
9. What is the result of "Nondisjunction" during cell division?
10. Why is the "G1 Phase" often the longest part of the cell cycle?
11. The process of "Synapsis" involves:
12. Which of the following describes the mechanism of "Disjunction"?
13. What happens during the "G2 Phase" (Gap 2)?
14. Why are "Bivalents" only seen in Meiosis and not in Mitosis?
15. How does a cell maintain its chromosome number constant through generations of a species?
16. The "S-phase" is characterized by the replication of ______ but the chromosome count remains ______.
17. Which mechanism ensures that the two chromatids of a chromosome are identical?
18. What is the role of "Kinetochores" in chromosome movement?
19. In Meiosis, the reduction from diploid to haploid occurs during:
20. What describes the "quiescent stage" ($G0$)?
