Chapter Exam

Chapter 10: Cell Cycle and Cell Division — Online MCQ Test

Q: Which stage of the cell cycle is the longest in a typical eukaryotic cell?

Answer: B. Interphase — Interphase is the longest phase of the cell cycle and is the period of active growth and preparation for division.

Q: DNA replication occurs during which part of interphase?

Answer: B. S phase — DNA replication takes place in the S phase, also called the synthesis phase.

Q: A cell that has completed DNA replication contains:

Answer: C. Double the original amount of DNA — After S phase, the DNA content is doubled because each chromosome has replicated into two sister chromatids.

Q: If a somatic cell with 2n = 16 undergoes mitosis, how many chromosomes will each daughter cell have?

Answer: B. 16 — Mitosis maintains chromosome number, so each daughter cell remains diploid with 16 chromosomes.

BIOLOGY · Grade 11 · CBSE(NCERT)

Practice Chapter 10: Cell Cycle and Cell Division with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 11 BIOLOGY. This chapter covers: Cell Cycle Interphase Mitosis Meiosis Cytokinesis Chromosomes Cell Division DNA Replication Growth Reproduction. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 10: Cell Cycle and Cell Division — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 11 BIOLOGY — Chapter 10: Cell Cycle and Cell Division, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which stage of the cell cycle is the longest in a typical eukaryotic cell?

A. M phase
B. Interphase ✓
C. Cytokinesis
D. Anaphase

Answer: B. Interphase
Interphase is the longest phase of the cell cycle and is the period of active growth and preparation for division.

DNA replication occurs during which part of interphase?

A. G1 phase
B. S phase ✓
C. G2 phase
D. M phase

Answer: B. S phase
DNA replication takes place in the S phase, also called the synthesis phase.

A cell that has completed DNA replication contains:

A. Half the original amount of DNA
B. The same amount of DNA as before replication
C. Double the original amount of DNA ✓
D. No DNA until mitosis ends

Answer: C. Double the original amount of DNA
After S phase, the DNA content is doubled because each chromosome has replicated into two sister chromatids.

If a somatic cell with 2n = 16 undergoes mitosis, how many chromosomes will each daughter cell have?

A. 8
B. 16 ✓
C. 32
D. 4

Answer: B. 16
Mitosis maintains chromosome number, so each daughter cell remains diploid with 16 chromosomes.

Which option best describes the outcome of mitosis in a diploid cell with respect to genetic stability?

A. It creates variation through crossing over
B. It preserves chromosome number and genetic information in daughter cells ✓
C. It halves the DNA content of daughter cells
D. It produces four cells from one parent cell

Answer: B. It preserves chromosome number and genetic information in daughter cells
Mitosis is an equational division that produces two genetically similar daughter cells, maintaining chromosome number.

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