Chapter 7: Cell Cycle — Online MCQ Test
BOTANY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 7: Cell Cycle with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers cell division stages including interphase mitosis and meiosis mechanics. Students examine chromosome behavior spindle formation significance of reduction divisi....
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Chapter 7: Cell Cycle — Important Questions & Answers
Which phase of the cell cycle is considered the 'resting phase' but is actually metabolically active?
- A. G1 phase
- B. Interphase
- C. M phase
- D. Cytokinesis
Answer: B. Interphase
Interphase is known as the resting phase because the cell is not dividing, but it is highly active in synthesizing proteins and DNA.
Interphase is known as the resting phase because the cell is not dividing, but it is highly active in synthesizing proteins and DNA.
Which of the following events characterizes the S-phase of the cell cycle?
- A. Protein synthesis
- B. DNA replication
- C. Cell organelle duplication
- D. Spindle fiber formation
Answer: B. DNA replication
S-phase stands for synthesis phase, where the DNA content of the cell doubles.
S-phase stands for synthesis phase, where the DNA content of the cell doubles.
During which sub-stage of Prophase I does 'crossing over' occur?
- A. Leptotene
- B. Zygotene
- C. Pachytene
- D. Diplotene
Answer: C. Pachytene
Crossing over, the exchange of genetic material between non-sister chromatids, occurs during the pachytene stage.
Crossing over, the exchange of genetic material between non-sister chromatids, occurs during the pachytene stage.
Compare Mitosis and Meiosis: Which statement is true?
- A. Both involve two rounds of division
- B. Mitosis produces four haploid cells
- C. Meiosis leads to genetic variation, while mitosis maintains identity
- D. Both occur in somatic cells
Answer: C. Meiosis leads to genetic variation, while mitosis maintains identity
Mitosis maintains genetic stability, whereas Meiosis introduces variation through crossing over and independent assortment.
Mitosis maintains genetic stability, whereas Meiosis introduces variation through crossing over and independent assortment.
A cell undergoes Meiosis. If the DNA content in the mother cell is '2C' in G1, what is the DNA content in each daughter cell at the end of Meiosis II?
- A. 4C
- B. 2C
- C. C
- D. 0.5C
Answer: C. C
After S-phase (4C), Meiosis I reduces it to 2C per cell, and Meiosis II reduces it further to C per cell.
After S-phase (4C), Meiosis I reduces it to 2C per cell, and Meiosis II reduces it further to C per cell.