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The picture shows plant cells as seen using a light microscope - OCR Gateway - GCSE Biology (Combined Science) - Question 11 - 2018 - Paper 1
Question 11
The picture shows plant cells as seen using a light microscope. X Fig. 11.1 (a) Draw a large labelled diagram of cell X. (b) The plant cells shown in Fig. 11.1 ar... show full transcript
Worked Solution & Example Answer:The picture shows plant cells as seen using a light microscope - OCR Gateway - GCSE Biology (Combined Science) - Question 11 - 2018 - Paper 1
Step 1
Draw a large labelled diagram of cell X.
Answer
To draw the diagram of cell X, follow these steps:
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Draw the Outline: Begin by sketching a rectangular shape to represent the cell wall. Ensure that the shape resembles similar plant cell structures, showing inter-cellular boundaries.
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Add Chloroplasts: Inside the cell outline, illustrate several oval shapes to represent chloroplasts, which supply the green color. Make sure to distribute them evenly but allow for some variability in shape and size.
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Label the Parts: Clearly label each part of the diagram. Include labels for:
- Cell wall
- Chloroplasts
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Ensure Clarity: Use a ruler for straight lines and avoid overlapping your labels with the drawing. The space between the labels should be spacious enough for easy reading.
Step 2
Explain how you can tell this from the picture.
Answer
The plant cells shown in Fig. 11.1 can be identified as not being root cells for several reasons:
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Presence of Chloroplasts: Root cells generally do not contain chloroplasts as they are not involved in photosynthesis. The image shows a visible distribution of chloroplasts, indicating these cells are likely part of a leaf or another part of the plant where photosynthesis occurs.
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Cell Shape and Structure: The cells depicted are likely to have a more regular and uniform shape typical of parenchyma cells found in leaves, compared to root cells which typically have a different structure adapted for nutrient absorption.
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Functionality: The overall appearance suggests that these cells are involved in photosynthesis, further confirming that they are not root cells, which primarily function in water and nutrient absorption from the soil.