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NEET · Biology · Class 11

Cell Cycle and Cell Division — NEET Biology MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

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Sample questions from this chapter

A mammalian cell completes a cycle in 24 hours but spends only one hour visibly dividing. What occupies most of the remaining time?
  1. Interphase, including growth and DNA replication ✓
  2. A prolonged anaphase
  3. Cytokinesis without nuclear activity
  4. Continuous chromosome condensation
Answer: A. Interphase occupies most of the cycle and includes G1, S and G2. Calling it resting is misleading because biosynthesis and genome duplication are intense.
Why not B: Anaphase is a brief part of M phase, not the dominant interval.
Why not C: Cytokinesis follows nuclear division and is not a 23-hour state.
Why not D: Interphase chromosomes are generally decondensed and metabolically active.
A diploid cell has 2n=8 and 2C DNA in G1. Immediately after S phase, before mitosis, what does it contain?
  1. 16 chromosomes and 4C DNA
  2. 8 chromosomes and 2C DNA
  3. 8 chromosomes, each with two chromatids, and 4C DNA ✓
  4. 4 chromosomes and 4C DNA
Answer: C. S phase creates sister chromatids while each joined pair still counts as one chromosome. Counting chromatids as chromosomes before centromere separation is the trap.
Why not A: Replication doubles chromatids, not centromere-defined chromosome number.
Why not B: Chromosome count remains eight, but DNA content doubles.
Why not D: Haploid reduction occurs in meiosis, not premitotic S phase.
A mitotic cell began with 2n=8. Just after all centromeres divide in anaphase, how many chromosomes are in the single undivided cell?
  1. 4
  2. 8
  3. 32
  4. 16 ✓
Answer: D. After centromere division each former chromatid counts as a chromosome, giving 16 temporarily; eight move to each pole. Chromosome number does not remain eight during anaphase itself.
Why not A: Four is a haploid count and does not occur in this mitosis.
Why not B: Eight applies before centromeres split and later within each daughter nucleus.
Why not C: Thirty-two confuses DNA strands or arms with chromosomes.

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Every NCERT question in this chapter is solved, free: NCERT solutions — Cell Cycle and Cell Division →

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Questions

How many NEET questions are there on Cell Cycle and Cell Division?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 11 chapter.

Is this NEET Biology chapter test free?

Yes. Every chapter test is free with no login. The only paid thing on the site is the full-length 90-question Biology mock and its all-India rank.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.