AQA Biology Cells Revision Notes
Master AQA Biology Cells using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Cells are the basic structural and functional units of all living organisms. They can be classified into prokaryotic and eukaryotic cells, each with distinct characteristics and functions.
Key Concepts
- 1All living organisms are made up of cells.
- 2Prokaryotic cells lack a nucleus and membrane-bound organelles.
- 3Eukaryotic cells have a true nucleus and organelles.
- 4Cell membranes regulate the movement of substances in and out of the cell.
- 5Cell division occurs through mitosis and meiosis.
Simple Explanation
Cells are the tiny building blocks that make up all living things. There are two main types of cells: prokaryotic, which are simple and do not have a nucleus, and eukaryotic, which are more complex and do have a nucleus. Cells have membranes that control what goes in and out, and they can divide to create new cells.
Memory Trick
“Remember 'PEM' for Prokaryotic cells lack a Nucleus and Eukaryotic cells have a Nucleus.”
Flashcards
What are the two main types of cells?
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Exam Questions
Describe and explain the structure and function of the cell membrane. [6 marks]
6 marksView mark scheme hint▾
Include details on phospholipid bilayer, proteins, and selective permeability.
Explain how the structure of eukaryotic cells differs from prokaryotic cells. [4 marks]
4 marksView mark scheme hint▾
Mention nucleus, organelles, and size differences.
What is meant by the term 'cell differentiation'? [2 marks]
2 marksView mark scheme hint▾
Define cell differentiation and its importance in multicellular organisms.
Practice Quiz
What type of cell lacks a nucleus?
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