1. Cell Wall:
- Function: Provides structural support and protection, maintaining cell shape and preventing bursting.
- Composition: Cellulose, hemicellulose, pectin, and lignin.
2. Plasma Membrane:
- Function: Regulates the passage of substances into and out of the cell, maintaining a stable internal environment.
- Composition: Phospholipid bilayer with embedded proteins.
3. Nucleus:
- Function: Contains the cell's genetic material (DNA) in the form of chromosomes, controls cellular activities, and directs protein synthesis.
- Composition: Nuclear envelope, nucleoplasm, nucleolus, and chromatin.
4. Cytoplasm:
- Function: Gel-like substance that fills the cell, providing a medium for organelle movement and biochemical reactions.
- Composition: Water, dissolved substances, and organelles.
5. Ribosomes:
- Function: Sites of protein synthesis, translating genetic code from mRNA into proteins.
- Composition: RNA and proteins.
6. Endoplasmic Reticulum (ER):
- Function: A network of interconnected membranes involved in protein synthesis, lipid synthesis, and detoxification.
- Types: Rough ER (with ribosomes) and Smooth ER (without ribosomes).
7. Golgi Apparatus:
- Function: Modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.
- Composition: Stack of flattened membrane-bound sacs called cisternae.
8. Mitochondria:
- Function: Powerhouse of the cell, responsible for cellular respiration to produce ATP (energy currency).
- Composition: Double membrane, outer membrane, inner membrane with cristae, and matrix.
9. Chloroplasts:
- Function: Sites of photosynthesis, converting light energy into chemical energy (glucose).
- Composition: Double membrane, thylakoid membranes (containing chlorophyll), and stroma.
10. Vacuole:
- Function: Storage of water, nutrients, and waste products, helps maintain turgor pressure.
- Composition: Membrane-bound sac filled with cell sap.
11. Plastids:
- Function: Involved in various processes like photosynthesis, pigment storage, and starch synthesis.
- Types: Chloroplasts, chromoplasts, and leucoplasts.
12. Cytoskeleton:
- Function: Provides structural support, helps with cell movement, and facilitates organelle transport.
- Composition: Microtubules, microfilaments, and intermediate filaments.
13. Peroxisomes:
- Function: Involved in detoxification and lipid metabolism, producing hydrogen peroxide.
- Composition: Single membrane-bound organelles containing enzymes.
These organelles work together to ensure the proper functioning of the plant cell, enabling it to grow, reproduce, and respond to its environment.
