Summary
Cells are the basic units of all living organisms, consisting of structures like the cytoplasm, cell membrane, and DNA. There are two main types of cells: eukaryotic and prokaryotic. Eukaryotic cells have a nucleus and membrane-bound organelles, while prokaryotic cells do not.
Exam Tips
Key Definitions to Remember
- Eukaryotic Cells: Cells with a nucleus and membrane-bound organelles.
- Prokaryotic Cells: Cells without a nucleus and membrane-bound organelles.
- Cell Membrane: A partially permeable membrane controlling movement in and out of the cell.
Common Confusions
- Confusing the presence of a nucleus in eukaryotic cells with prokaryotic cells.
- Misunderstanding the role of ribosomes in protein synthesis.
Typical Exam Questions
- What is the main difference between eukaryotic and prokaryotic cells? Eukaryotic cells have a nucleus, while prokaryotic cells do not.
- What structure is found in eukaryotic cells but not in prokaryotic cells? Chromatin.
- How do viruses replicate? Viruses replicate inside host cells using the host's machinery.
What Examiners Usually Test
- Differences between eukaryotic and prokaryotic cells.
- Functions of cell organelles like mitochondria and ribosomes.
- Understanding of cell structures and their roles in cellular processes.