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Specialized Cells and Their Functions — Free MYP3 Sciences Practice Questions
1QuestionAdaptations of Specialized CellsConcept Practice
2 marks~3 minCriterion A
The diagram below shows a sperm cell with three regions labeled X, Y, and Z.
a
Identify the part of the sperm cell that contains the genetic information. [1]
b
Explain why the region labeled Y, which contains many mitochondria, is important for the sperm cell to carry out its function. [1]
Solutions
2QuestionComparing Specialized vs Unspecialized CellsAssessment Practice
5 marks~8 minCriterion C
A study measured three features of four cell types.
Cell type: Root hair cell / Red blood cell / Nerve cell / Unspecialized cell
Surface area (arbitrary units): 500 / 140 / 300 / 200
Number of mitochondria: 50 / 0 / 100 / 20
Specialized organelles present: Yes / No / Yes / No
Cell type: Root hair cell / Red blood cell / Nerve cell / Unspecialized cell
Surface area (arbitrary units): 500 / 140 / 300 / 200
Number of mitochondria: 50 / 0 / 100 / 20
Specialized organelles present: Yes / No / Yes / No
a
Identify the unspecialized cell from the table and state two pieces of data that support your answer. [2]
b
Explain how the structure of the red blood cell suits its function, using data from the table. [1]
c
A student claims: "Specialized cells are always more effective than unspecialized cells." Analyse this claim using evidence from the table and your own knowledge. [2]
Solutions
3QuestionAdaptations of Specialized CellsAssessment Practice
5 marks~8 minCriterion B
The table below shows the oxygen absorption rate for four cell types with different surface-area-to-volume (SA:V) ratios.
| Cell Type | A | B | C | D |
|---|---|---|---|---|
| SA | V Ratio: 2:1 | 4:1 | 6:1 | 8:1 |
| Oxygen Absorption Rate (mL O₂/g tissue/min) | 0.5 | 1.0 | 1.5 | 2.0 |
a
Describe the pattern shown in the data. [2]
b
Predict the oxygen absorption rate for a cell with an SA:V ratio of 10:1. Explain your prediction using the relationship between SA:V ratio and diffusion. [3]
Solutions
4QuestionComparing Specialized vs Unspecialized CellsAssessment Practice
8 marks~12 minCriterion D
A biotechnology company has developed a treatment using stem cells sourced from human embryos to repair damaged spinal cord tissue. The embryos are destroyed during this process. Early trials show some patients regaining movement.
a
Describe what makes stem cells unspecialized and explain why this property is necessary for repairing spinal cord tissue. [2]
b
Explain one benefit of this treatment for patients and one concern about the source of the stem cells. [2]
c
A patient advocacy group argues the treatment should be approved immediately, while a religious organization argues it must be banned. Analyse how society could respond to both perspectives when deciding whether to allow this treatment. [4]
Solutions
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