OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) Cells and Microscopy Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on Cells and Microscopy, with mark schemes. Covers cell ultrastructure, prokaryotes and eukaryotes, microscopes and magnification calculations.
Cells and Microscopy exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Biology B (Advancing Biology) Cells and Microscopy
This topic covers cells and how we see them.
What you need to know
- Microscopes Light, electron and laser scanning confocal microscopes.
- Magnification Magnification = image size / actual size, with unit conversions.
- Ultrastructure Organelles in plant and animal cells.
- Prokaryotes Bacterial cell structure compared with eukaryotes.
Common mistakes in Cells and Microscopy
- Confusing resolution and magnification.
- Unit errors between mm, μm and nm.
- Saying plant cells lack mitochondria.
Try three Cells and Microscopy exam-style questions
1. An organelle is 2 μm and its image 40 mm. Find the magnification. (1 mark)
Show the mark scheme answer
x20 000.
2. Give one advantage of a confocal microscope. (1 mark)
Show the mark scheme answer
It produces clear 3D images of thick specimens.
3. State one difference between prokaryotic and eukaryotic ribosomes. (1 mark)
Show the mark scheme answer
Prokaryotes have 70S; eukaryotes have 80S.
Cells and Microscopy FAQs
What does Cells and Microscopy cover?
Cell ultrastructure and microscopy.
Which practical links here?
Preparing slides and using a graticule.
Why stain specimens?
To increase contrast between structures.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
