This question is about cell structures - AQA - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Question 1
This question is about cell structures.
1. Draw one line from each cell structure to the type of cell where the structure is found.
- Cell Structure
- Nucleus... show full transcript
Worked Solution & Example Answer:This question is about cell structures - AQA - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Step 1
Draw one line from each cell structure to the type of cell where the structure is found.
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Answer
Draw a line from 'Nucleus' to 'Eukaryotic cells'.
Draw a line from 'Permanent vacuole' to 'Plant cells only'.
Draw a line from 'Plasmid' to 'Prokaryotic cells'.
Step 2
What are the names of structures A, B and C?
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Answer
A: Vacuole; B: Ribosome; C: Cell wall.
Step 3
Describe how the student should adjust the microscope to see the cells on Slide A more clearly.
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Answer
The student should turn the fine focusing knob until the cells are in focus. This will help clear the view without adjusting magnification.
Step 4
Describe how the student should adjust the microscope to see the cells on Slide B more clearly.
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The student should rotate the nosepiece to a higher power lens to increase the magnification, allowing for a clearer view of the cells.
Step 5
Calculate the magnification of the drawing.
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Answer
To calculate magnification, use the formula:
extMagnification=Size of real objectSize of image
The size of the image is 112 mm, and the size of the real object is 280 μm (which is equal to 0.28 mm).
Thus,
Magnification=0.28112=400.
Therefore, the magnification of the drawing is 400x.
