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OJEE Cell Cycle and Cell Division — practice questions

Explore 36 free Cell Cycle and Cell Division questions in OJEE Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Cell Cycle and Cell Division questions and exercises with answers

Showing questions 1–30 of 36.

The cell cycle is conventionally divided into:Read the answer and worked solution →DNA replication occurs during which phase?Read the answer and worked solution →Mitosis produces:Read the answer and worked solution →Meiosis is the type of cell division that produces:Read the answer and worked solution →The phases of mitosis in correct order are:Read the answer and worked solution →At the end of S phase, each chromosome consists of:Read the answer and worked solution →The five sub-stages of prophase I of meiosis are:Read the answer and worked solution →In meiosis, the homologous chromosomes separate during:Read the answer and worked solution →During metaphase, chromosomes align at the:Read the answer and worked solution →In G2 of interphase, DNA content per cell relative to G1 is:Read the answer and worked solution →The synaptonemal complex is formed during:Read the answer and worked solution →A diploid cell with 2n = 8 undergoes meiosis. Number of chromosomes in each daughter cell after meiosis II completion:Read the answer and worked solution →Number of bivalents (paired homolog pairs) at metaphase I of a cell with 2n = 12:Read the answer and worked solution →DNA content at various cell cycle phases (C = haploid DNA content):Read the answer and worked solution →Complete the definition of the cell cycleRead the answer and worked solution →Interphase or M phase?Read the answer and worked solution →Order the subdivisions of interphaseRead the answer and worked solution →True or false: cell divisionRead the answer and worked solution →Naming the phasesRead the answer and worked solution →Mitosis or meiosis?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: phase with what happensRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the cell cycleRead the answer and worked solution →True or false: why interphase mattersRead the answer and worked solution →Before or during division?Read the answer and worked solution →Reading the cycleRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →

Worked practice questions

The cell cycle is conventionally divided into:

  1. Two stages
  2. Anaphase only
  3. Interphase (G1, S, G2) and M-phase (mitosis + cytokinesis)
  4. Just mitosis
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Correct answer: C. Interphase (G1, S, G2) and M-phase (mitosis + cytokinesis)

**Interphase:** G1 (cell growth, organelle synthesis), S (DNA replication), G2 (preparation for mitosis). **M-phase:** mitosis + cytokinesis. Interphase is ~95% of the cycle in a typical mammalian cell.

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DNA replication occurs during which phase?

  1. S phase (synthesis)
  2. G1
  3. G2
  4. M phase
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Correct answer: A. S phase (synthesis)

S phase = DNA Synthesis. The genome is replicated semiconservatively. At the end of S, each chromosome consists of 2 sister chromatids joined at centromere. DNA content doubles from 2C to 4C.

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Mitosis produces:

  1. Random cells
  2. 4 haploid cells
  3. 2 daughter cells genetically identical to the parent
  4. Gametes only
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Correct answer: C. 2 daughter cells genetically identical to the parent

**Mitosis:** equational division. Produces 2 daughter cells with same chromosome number (2n → 2n) as parent. Maintains genetic continuity. Used in growth, repair, asexual reproduction.

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