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AQA AS Biology Microscopes Paper 1 | Cell Structure & Microscopy Exam

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2025/2026 Written for academic year
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Course AS Biology
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AQA AS Biology Paper 1 exam focused on microscopes and cell structure. Covers optical and electron microscopy, magnification calculations, organelles, and biological data analysis for AS Level Biology revision.

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Name:

Date:




AS-level Mark Grade


AQA.BIOLOG
Y
Materials
✓ For.this.paper.you.must.have:
Ruler
. .


Instructions


All.working.must.be.shown



Information

, The.photograph.shows.part.of.the.cytoplasm.of.a.cell.
1.




(a) [i[ Organelle.X.is.a.mitochondrion.

What.is.the.function.of.this.organelle?




[1[

[ii[ Name.organelle.Y.


[1[

(b) This.photograph.was.taken.using.a.transmission.electron.microscope..The.structure.of.the
.organelles.visible.in.the.photograph.could.not.have.been.seen.using.an.optical[light[.micr
oscope..Explain.why.




[2[
[Total.4.marks[




Page.1.of.38
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, (a) Contrast.how.an.optical.microscope.and.a.transmission.electron.microscope.work.and
2. contrast.the.limitations.of.their.use.when.studying.cells.




[6[

(b) The.diagram.shows.an.image.from.an.optical.microscope.of.meiosis.occurring.in.a.flower
.bud.of.a.flowering.plant..W.and.Z.are.undergoing.meiosis.




Page.2.of.38
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