OCR Biology Cells Revision Notes
Master OCR 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. Understanding cell structure and function is crucial for studying biology at the A-Level.
Key Concepts
- 1All living organisms are composed of cells.
- 2Cells can be prokaryotic or eukaryotic.
- 3Cell organelles have specific functions that contribute to the cell's overall operation.
- 4Cell membranes are selectively permeable, controlling the movement of substances in and out.
- 5Cell division is essential for growth, repair, and reproduction.
Simple Explanation
Cells are like tiny building blocks that make up all living things. They can be simple, like bacteria, or more complex, like plants and animals. Each part of a cell has a special job, such as producing energy or protecting the cell. Cells can also divide to help organisms grow and heal.
Memory Trick
“Remember 'PEMC' for the key types of cells: Prokaryotic, Eukaryotic, Membrane-bound organelles, and Cell division.”
Flashcards
What are the two main types of cells?
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Exam Questions
Describe and explain the process of cell division in eukaryotic cells. [6 marks]
6 marksView mark scheme hint▾
Include stages of mitosis, significance of cell division, and differences from prokaryotic division.
Explain how the structure of the cell membrane is related to its function. [4 marks]
4 marksView mark scheme hint▾
Discuss the phospholipid bilayer, proteins, and selective permeability.
What is meant by the term 'organelle'? [2 marks]
2 marksView mark scheme hint▾
Define organelle and give examples.
Practice Quiz
Which of the following is a prokaryotic cell?
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