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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, and you get your all-India rank on every one. Nothing on the site is on sale right now.

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.