Year 11 - Science
Classifying organisms as eukaryotic or prokaryotic
Classification in modern biology
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores the impact of biology developments on classification systems, highlighting how electron microscopy enhances understanding of sub-cellular structures. It covers eukaryotic and prokaryotic cells, quantitative skills, unit conversions, and the evolution of scientific methods.
Lesson Summary
You will learn to describe the common features of the cells of eukaryotic and prokaryotic organisms.
Key Notes
- The common features of animal and plant cells.
- Animals, plants, fungi and protists are made up of cells with a nucleus in which their genome is stored.
- Organisms made of cells with a nucleus are classified as eukaryotic organisms.
- Common features of bacteria cells, including cell membrane, cell wall, plasmids and storing the genome in the cytoplasm.
- Organisms made of cells without a nucleus are classified as prokaryotic organisms.
Vocabulary To Learn
- nucleus: A sub-cellular structure that contains chromosomes made of DNA molecules.
- genome: The entire genetic material of an organism.
- eukaryote: A cell or organism which has a cell membrane, cytoplasm and genetic material enclosed in a nucleus.
- plasmid: A small ring of DNA found in a bacterial cell.
- prokaryote: An organism whose cell has cytoplasm and a cell membrane surrounded by a cell wall. The genetic material is not enclosed in a nucleus.
Common Mistakes To Avoid
- Pupils might think that all eukaryotic cells have the same cell components.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The common features of animal and plant cells. Animals, plants, fungi and protists are made up of cells with a nucleus in which their genome is stored.
2. Define this scientific word and use it in context. 'nucleus'
A sub-cellular structure that contains chromosomes made of DNA molecules. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils might think that all eukaryotic cells have the same cell components. Correction: Draw pupils' attention to the differences between the different types of eukaryotic cells. Focus on the presence of a nucleus, mitochondria, and, in plant cells, chloroplasts, as identifying characteristics of eukaryotic cells.
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