Post-Lecture Online Assessment : Cell Cycle

1. What is the best definition of the cell cycle?

• A single-phase process where a cell only divides
• A series of events in which a cell grows, duplicates its DNA, and divides into two daughter cells
• The breakdown of the nuclear envelope during mitosis
• A metabolic pathway producing ATP

2. Choose the CORRECT stages of A, B, C and D shown in the cell cycle below.

• A: G2 phase , B: S phase , C: G1 phase and D : Mitosis phase
• A: G1 phase, B: S phase, C: G2 phase and D : Mitotic phase
• A: G1 phase, B: S phase, C : G2 phase and D : Mitotis phase
• A: S Phase, B : G1 phase, C: G2 phase and D : Meiosis phase

3. What is the longest phase of the cell cycle in most cells?

• Interphase
• Anaphase
• Metaphase
• Telophase

4. During the G₁ phase, what is the cell primarily doing?

• Replicating DNA.
• Condensing chromosomes.
• Growing in size and synthesizing mRNA and proteins
• Dividing into two daughter cells.

5. Which activity is NOT characteristic of the G₁ phase?

• Cell increase in size.
• Increase in the number of organelles such as mitochondria & endoplasmic reticulum.
• Cell produces lipid, carbohydrates & protein.
• Centrosomes replicated.

6. What is the primary event of the S phase?

• Cell division
• Chromosome condensation
• DNA replication
• Cytokinesis

7. Which event occurs in parallel with DNA replication during the S phase?

• Synthesis of organelles.
• Chromosome condensation
• Synthesis of histone proteins and nucleosome assembly
• Spindle formation

8. The region of a chromosome in which the two double strands of replicated DNA are held together is called __________.

• a centromere
• chromatin
• a centriole
• a chromatid

9. What is the primary role of the G₂ phase?

• DNA replication
• Cytokinesis
• Chromosome segregation
• Synthesis of microtubules for development of spindle fibers.

10. Which pair includes a phase of the cell cycle and a cellular process that occurs during that phase?

• G1 phase, DNA replication
• G2 phase, preparation for mitosis
• S phase, cell division
• M phase, cell growth