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Structure and Function of Cells — Free MYP3 Sciences Practice Questions
1QuestionBasic Structure of Plant and Animal CellsConcept Practice
3 marks~5 minCriterion A
The diagram shows two cells, labelled Cell A and Cell B.
a
Identify which cell is the plant cell. [1]
b
Explain how one visible structure in the diagram supports your identification in (a). [2]
Solutions
2QuestionFunctions of Cell Organelles Nucleus Cytoplasm etcAssessment Practice
6 marks~9 minCriterion C
A doctor examines cell samples from a patient and observes two abnormalities: some cells contain small or misshapen mitochondria, while others have enlarged rough endoplasmic reticulum (rough ER).
a
Describe one way that abnormal mitochondria could affect the functions of these cells. [2]
b
Explain how enlarged rough ER could indicate a problem with protein production in these cells. [2]
c
A colleague suggests that any cell whose organelles look normal under the microscope must be functioning normally. Analyse two reasons why this conclusion may not be valid. [2]
Solutions
3QuestionBasic Structure of Plant and Animal CellsConcept Practice
3 marks~5 minCriterion B
The table below shows the presence (Yes) or absence (No) of three structures in three unknown cell samples.
| Structure | Sample X | Sample Y | Sample Z |
|---|---|---|---|
| Cell wall | Yes | No | Yes |
| Chloroplasts | Yes | No | No |
| Large vacuole | Yes | No | Yes |
a
State one structure present in Sample X that is not found in animal cells. [1]
b
Explain why Sample Z is classified as a plant cell, even though it lacks chloroplasts. [1]
c
Using all three samples, describe the pattern in the data that allows you to distinguish plant cells from animal cells. [1]
Solutions
4QuestionBasic Structure of Plant and Animal CellsAssessment Practice
6 marks~9 minCriterion D
A research laboratory claims to have created a 'plantimal' cell by fusing a plant cell and an animal cell. Scientists hope this could lead to new medical treatments, but the innovation raises ethical and environmental questions.
a
Describe two structural features found in a plant cell but not in a typical animal cell. [2]
b
Explain how one of these structural features could create an ethical concern about producing 'plantimal' cells. [2]
c
A 'plantimal' cell is accidentally released into a local pond ecosystem. Analyse one way its combined plant and animal cell structures could affect the organisms already living there. [2]
Solutions
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