- Cell Wall
- Cytoplasm and Cell Organelles
- Nucleus
- Endoplasmic Reticulum
- Mitochondria
- Golgi Apparatus
- Lysosomes
- Plastids and Chloroplasts
- Vacuoles
- Prokaryote and Eukaryote
- Fluid Mosaic Model
For the complete syllabus, check out our PMDC MDCAT Syllabus 2025 article.
Golgi Apparatus
The Golgi apparatus are tubular system with sacs and it has a parallel arranged, flattened membrane bound vesicles which lack ribosomes.
Location:
They are typically located near the nucleus membrane.
Quantity:
The number of golgi bodies in a cell may be very large; usually it varies from 3-15 per cell. It is absent in bacteria and RBCs of mammals.
Golgi Apparatus/Golgi Complex Overview
Membrane:
- Single
Structure:
- Consists of smooth, flattened, membrane-bound, sac-like structures called cisternae, stacked in parallel rows
- Frequently surrounded by vesicles discharged from the cisternae
- Cisternae are curved to give polarity:
- Forming or cis face (convex) receives vesicles
- Maturing face or trans face (concave) where vesicles leave
- In plant cells, composed of separate units called dictyosomes
Functions:
- Involved in the synthesis and repair of cell membranes
- Formation of lysosomes and peroxisomes
- Cell wall secretion
- Major function is secretion
- Participates in storage, modification, and packaging of various biochemical products
- Works with smooth ER to modify proteins for export by the cell
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