IB Biology SL D2.1 Cell and Nuclear Division Questions
Practise IB Biology SL D2.1 by identifying mitosis stages, explaining cytokinesis and interpreting cell-division evidence.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- identify mitosis stages in micrographs and explain how sister chromatids separate
- compare cytokinesis examples, including equal division and unequal budding in yeast
- calculate or interpret mitotic index and chromosome-number changes from cell-division evidence
Covered syllabus points
D2.1.1—Generation of new cellsD2.1.2—CytokinesisD2.1.3—Equal and unequal cytokinesisD2.1.4—Roles of mitosis and meiosisD2.1.5—DNA replication prerequisiteD2.1.6—Shared featuresD2.1.7—Phases of mitosisD2.1.8—Identification of mitosis phasesD2.1.9—Meiosis as reduction divisionD2.1.10—Down syndromeD2.1.11—Meiosis generates variation
Learn this topic
Question 1
Which process contributes to growth of a multicellular body?
A
Exocytosis
B
Meiosis
C
Mitosis
D
Osmosis
Question 2
Both the genome and the environment of an organism affect its growth and development. Variation between individuals of a species can be continuous or discrete (discontinuous). Mitosis produces identical cells for growth and meiosis allows for variation.
The micrographs show onion and whitefish cells in mitosis.
Question (a)
(a)
Identify the phase of mitosis labelled X .
[ 1 ]
Question (b)
(b)
The process of cytokinesis is occurring in the whitefish embryo cells. Explain how cytokinesis occurs in this animal cell.
[ 2 ]
Question 3
Daughter cells usually receive equal amounts of cytoplasm as parent cells undergo cytokinesis. Which of the following is an exception?
A
Asexual reproduction by budding in yeast
B
Bacterial cell division
C
Cloning of lymphocytes during an immune response
D
Formation of a zygote during fertilization
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