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AP Intermediate 1st Year Cell Cycle and Cell Division — practice questions

Explore 50 free Cell Cycle and Cell Division questions in AP Intermediate 1st Year 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 50.

DNA replication during the cell cycle occurs inRead the answer and worked solution →In which phase of mitosis do chromosomes align at the cell's equator?Read the answer and worked solution →Crossing over between homologous chromosomes occurs duringRead the answer and worked solution →DNA replication in the cell cycle happens inRead the answer and worked solution →Adult nerve cells and heart muscle cells most often sit in which phase?Read the answer and worked solution →A typical human cell completes one full cycle in roughlyRead the answer and worked solution →What happens to sister chromatids during anaphase?Read the answer and worked solution →A diploid (2n=46) human cell undergoes mitosis. The two daughter cells each haveRead the answer and worked solution →Plant cell cytokinesis differs from animal cytokinesis because plant cellsRead the answer and worked solution →Liquid endosperm in coconut water is multinucleate becauseRead the answer and worked solution →An adult human's skin cell has 2n=46 chromosomes. The chromosome number of its mitotic daughter isRead the answer and worked solution →Across the entire meiosis process, DNA is replicatedRead the answer and worked solution →Crossing over between homologous chromosomes occurs in which sub-stage?Read the answer and worked solution →Starting from one diploid (2n) parent cell, meiosis producesRead the answer and worked solution →NEET · Biology · Mitosis or MeiosisRead the answer and worked solution →NEET · Biology · Stages of MitosisRead the answer and worked solution →NEET · Biology · Sub-stages of Prophase I (Meiosis)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 →

Worked practice questions

DNA replication during the cell cycle occurs in

  1. G₁ phase
  2. S phase
  3. G₂ phase
  4. M phase
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Correct answer: B. S phase

S phase = Synthesis. DNA is copied here, so each chromosome ends up as two sister chromatids. G₁ is growth before S; G₂ is growth after.

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In which phase of mitosis do chromosomes align at the cell's equator?

  1. prophase
  2. metaphase
  3. anaphase
  4. telophase
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Correct answer: B. metaphase

**Metaphase:** chromosomes align at the metaphase plate (equator). **Anaphase:** they separate and move to poles. **Prophase:** condense; telophase: decondense.

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Crossing over between homologous chromosomes occurs during

  1. leptotene
  2. zygotene
  3. pachytene
  4. diakinesis
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Correct answer: C. pachytene

Crossing over (recombination) happens in the pachytene stage of prophase I. Homologues are fully paired (synapsed), and segments are exchanged — the main source of genetic variation in sexual reproduction.

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More Biology topics

The Living World & Biological ClassificationPhotosynthesis in Higher PlantsAnimal KingdomBody Fluids and CirculationBreathing and Exchange of GasesLocomotion and MovementNeural Control and Chemical CoordinationPlant Growth and Development