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Structure and Function of Cells — Free MYP1 Sciences Practice Questions
1QuestionBasic Structure of Plant and Animal CellsConcept Practice
4 marks~6 minCriterion A
The diagram below shows a plant cell and an animal cell with their parts labelled.
a
Name one structure that is found in the plant cell but not in the animal cell. [1]
b
Describe what the cell wall does for the plant cell. [1]
c
Give one reason why a plant cell needs a cell wall and one reason why an animal cell does not. [2]
Solutions
2QuestionImportance of Cell Membrane and CytoplasmAssessment Practice
6 marks~9 minCriterion D
A water filter uses a special membrane to clean dirty water. The membrane blocks all harmful substances but also blocks 3 out of every 10 nutrients in the water.
a
Name one job of the cell membrane in a living cell. [1]
b
Describe one way this water filter membrane is similar to a cell membrane. [2]
c
This filter removes all harmful substances but also removes some nutrients. Describe one benefit and one drawback of using this filter in a community where people have no other water source. [3]
Solutions
3QuestionImportance of Cell Membrane and CytoplasmConcept Practice
2 marks~3 minCriterion B
A student places onion cells in sugar water solutions of 0%, 5%, 10%, 15%, and 20%. After 10 minutes, she measures the size of the cytoplasm in each cell.
a
Identify the independent variable and the dependent variable in this investigation. [1]
b
Identify one controlled variable and explain why it must be kept the same. [1]
Solutions
4QuestionUnderstanding the Cell as the Basic Unit of LifeConcept Practice
3 marks~5 minCriterion C
The table below shows the number of cells in three living things.
Organism: Amoeba — Number of cells: 1
Organism: Hydra — Number of cells: about 100
Organism: Mouse — Number of cells: about 50 000 000 000
Organism: Amoeba — Number of cells: 1
Organism: Hydra — Number of cells: about 100
Organism: Mouse — Number of cells: about 50 000 000 000
a
Identify the pattern in the number of cells shown in the table. [1]
b
Describe what all three organisms have in common, based on the data. [1]
c
Compare the amoeba and the mouse to explain what the data suggests about cells as the basic unit of life. [1]
Solutions
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