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Cell structure and microscopy · GCSE Biology · Courselo

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GCSE Biology
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Cell biology

Cell structure and microscopy

Cell biology · Lesson 1 of 7

Lesson 1 of 7

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Unit 1

Cell biology

7 lessons · 9 h 15 min of study

Cell structure and microscopyReading · 0%
Specialised cells and levels of organisation1 h 15 min of study
Prokaryotes, viruses and microorganisms1 h of study
Movement across cell membranes1 h 30 min of study
Enzymes and biological molecules1 h 45 min of study
Cell division, stem cells and growth1 h 30 min of study
Characteristics of living organisms45 min of study

This unit is ≈17% of the GCSE Biology, across 7 lessons. Full syllabus

Lesson 1 of 7 · Cell biology

Cell structure and microscopy

3 quick checks≈3% of the testFoundational: Foundational: the groundwork the rest of the unit builds on

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By the end you’ll be able to

Identify and describe the functions of the nucleus, cytoplasm, cell membrane, mitochondria and ribosomes in animal and plant cells, and of the cell wall, chloroplasts and permanent vacuole in plant cells.
Compare animal cells, plant cells and specialised eukaryotic cells using correct biological terminology and visible structural features.

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Adaptive questions on cell structure and microscopy.

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Describe how light microscopes are used to prepare, focus and observe specimens, including common steps in slide preparation such as staining and the use of a coverslip.

Explain the difference in resolving power and magnification between light microscopes and electron microscopes, and relate this to what each can reveal about cell ultrastructure.

Calculate magnification, actual size and image size using $\text{magnification} = \dfrac{\text{image size}}{\text{actual size}}$, converting units between mm, $\mu\text{m}$ and nm where needed.

Interpret images, eyepiece graticule data, scale bars and microscope observations to estimate size and compare cellular detail.

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Next lessonSpecialised cells and levels of organisation