Practice IB Biology Topic D2.1 Cell and Nuclear Division with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for D2.1 Cell and Nuclear Division and mirrors Paper 1A, 1B, 2 style where relevant.
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What is the purpose of meiosis in eukaryotic organisms?
Why must DNA replicate before a parent cell divides?
First share chloroplasts equally between the diagram’s prospective daughters. Which intervention supplies both organelles to every final cell?
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A diploid nucleus was measured before and after S phase. Which interpretation is supported?
| Stage | Chromosome number | DNA / pg |
|---|---|---|
| before S phase | 12 | 8 |
| after S phase | 12 | 16 |
What feature is shared by both mitosis and meiosis?
Producing two identical nuclei
Producing haploid nuclei for sexual reproduction
Replicating chloroplast DNA
Allowing asexual reproduction in prokaryotes
To replace histones after supercoiling
So that both resulting nuclei contain the same genetic information
Because mitosis only works with single-stranded DNA
To initiate transcription before cell division
Each chromosome now consists of two sister chromatids
Each homologous pair fused, halving the chromosome number
Chromosomes segregated while DNA remained in one nucleus
Cytokinesis doubled DNA without replicating chromosomes
Production of genetically identical daughter cells
Reduction of chromosome number
DNA replication before division
Creation of polar bodies
