Cells Cheat Sheet
Grades 5-9 · Quick Reference
Quick Reference
- ★Cells are the basic unit of life.
- ★Eukaryotic cells have a nucleus; prokaryotic cells do not.
- ★Mitochondria produce energy for the cell.
- ★Plant cells have chloroplasts for photosynthesis.
- ★The cell membrane controls what enters and exits the cell.
Cell Structures
Cell Membrane
The outer boundary of the cell; controls what enters and exits.
Example: Like a gatekeeper, the cell membrane allows nutrients in and waste out.
Cytoplasm
The gel-like substance inside the cell where organelles are located.
Example: Imagine the cytoplasm as the 'soup' inside the cell, holding all the ingredients (organelles).
Nucleus
The control center of the cell; contains DNA.
Example: The nucleus is like the brain of the cell, directing all activities.
Mitochondria
The powerhouse of the cell; produces energy (ATP).
Example: Mitochondria are like tiny energy factories within the cell.
Vacuole
Stores water, nutrients, and waste.
Example: Plant cells have a large central vacuole to store water.
Types of Cells
Prokaryotic Cells
Simple cells without a nucleus or other membrane-bound organelles.
Example: Bacteria are prokaryotic cells.
Eukaryotic Cells
Complex cells with a nucleus and other membrane-bound organelles.
Example: Animal and plant cells are eukaryotic cells.
Plant Cells
Eukaryotic cells with chloroplasts and a cell wall.
Example: Plant cells can perform photosynthesis.
Animal Cells
Eukaryotic cells without chloroplasts or a cell wall.
Example: Animal cells cannot perform photosynthesis.
Cell Processes
Cellular Respiration
The process of breaking down glucose to release energy (ATP).
Example: Cells use oxygen to break down sugar and release energy.
Photosynthesis
The process of using sunlight to convert carbon dioxide and water into glucose and oxygen.
Example: Plants use photosynthesis to make their own food.
Cell Division (Mitosis)
The process by which a cell divides into two identical daughter cells.
Example: Mitosis is important for growth and repair.
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