Chapter Exam

Chapter 7: Cell Cycle — Online MCQ Test

Q: Which phase of the cell cycle is considered the 'resting phase' but is actually metabolically active?

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.

Q: Which of the following events characterizes the S-phase of the cell cycle?

Answer: B. DNA replication — S-phase stands for synthesis phase, where the DNA content of the cell doubles.

Q: During which sub-stage of Prophase I does 'crossing over' occur?

Answer: C. Pachytene — Crossing over, the exchange of genetic material between non-sister chromatids, occurs during the pachytene stage.

Q: 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?

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.

BOTANY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 7: Cell Cycle with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th BOTANY. 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.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 7: Cell Cycle — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th BOTANY — Chapter 7: Cell Cycle, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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.

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.

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.

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?