This diagram covers Cell Structure Diagrams within Cell Organelles for GCSE Biology. Revise Cell Organelles in Cell Biology for GCSE Biology with 12 exam-style questions and 15 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 13 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

🔬 Cell Structure Diagrams

Painted animal cell showing nucleus (dark blue with purple nucleolus), olive-green mitochondria with internal cristae, brown ribosomes scattered throughout, rough endoplasmic reticulum network, and cell membrane outline. 5 labelled callouts cover nucleus (contains DNA), mitochondria (aerobic respiration), ribosomes (protein synthesis), cytoplasm (chemical reactions), cell membrane (controls entry/exit). Bottom parchment notes that animal cells lack chloroplasts, cell wall, and permanent vacuole.

Figure 1: Animal cell — all organelles labelled

Practice questions for Cell Organelles

Scientists studying mitochondria use electron microscopes rather than light microscopes. Which statement correctly explains why electron microscopes are more useful for studying cell ultrastructure?

A. Electron microscopes produce a coloured image that makes organelles easier to identify
B. Electron microscopes have a higher resolution, so finer details of organelles can be seen
C. Electron microscopes allow scientists to study living cells in real time
D. Electron microscopes are cheaper and easier to use than light microscopes

1 markfoundation

A researcher is isolating mitochondria from liver cells using cell fractionation. The protocol states the homogenisation solution must be: (i) cold, (ii) isotonic, and (iii) buffered. Explain why each of these three conditions is necessary.

3 marksstandard

Quick recall flashcards

What does the term 'ultrastructure' mean in cell biology?

Ultrastructure refers to the fine internal structural detail of cells and organelles — features too small to be seen with a light microscope. Ultrastructure is revealed by electron microscopy. Examples: cristae of mitochondria, thylakoids of chloroplasts, nuclear pores, rough ER ribosomes.

What is cell fractionation and what is it used for?

Cell fractionation is a technique that separates organelles from a cell homogenate using differential centrifugation. It allows individual organelle types to be isolated in a pure form so their structure and function can be studied in detail.

The City Inside Every Cell

Animal Cell: Organelles and Their Functions

Cell Structure Diagrams