Summary
Cells are the basic unit of life, found in both animals and plants, each with unique structures and functions.
- Cell — the basic unit of life in all living organisms.
Example: Animal and plant cells are both types of cells. - Nucleus — controls all activities in the cell and contains genetic information.
Example: The nucleus is like the brain of the cell. - Cytoplasm — jelly-like substance where cell activities take place.
Example: Cytoplasm is found in both animal and plant cells. - Cell Membrane — controls movement of substances in and out of the cell.
Example: The cell membrane acts like a gatekeeper. - Cell Wall — supports and gives the plant cell its shape.
Example: Only plant cells have a cell wall. - Chloroplast — contains chlorophyll which traps sunlight to make food during photosynthesis.
Example: Chloroplasts are found in plant cells but not in animal cells.
Exam Tips
Key Definitions to Remember
- Cell: Basic unit of life
- Nucleus: Controls cell activities and contains genetic information
- Cytoplasm: Jelly-like substance for cell activities
- Cell Membrane: Controls movement of substances
- Cell Wall: Supports plant cell shape
- Chloroplast: Contains chlorophyll for photosynthesis
Common Confusions
- Confusing the functions of the nucleus and cytoplasm
- Mixing up the cell wall and cell membrane
Typical Exam Questions
- What is the basic unit of life?
The cell - What is the function of the nucleus?
Controls cell activities and contains genetic information - How does the cell membrane function?
It controls the movement of substances in and out of the cell
What Examiners Usually Test
- Differences between animal and plant cells
- Functions of cell organelles
- Importance of chloroplasts in plant cells