Practical 3 Cell Biology, RR & SER Malaysian 2024 PDF

Non membranous cell organelles w Free ribosomes: - Scattered in cytoplasm. - Can form polysomes (polyribosome). - Synthesize proteins for internal use of cells. w Attached ribosomes: - Formed RER. - Synthesize proteins that will secreted from cells. E.M: - Small dense granules. - 2 subunits. - Polys...

Non membranous cell organelles w Free ribosomes: - Scattered in cytoplasm. - Can form polysomes (polyribosome). - Synthesize proteins for internal use of cells. w Attached ribosomes: - Formed RER. - Synthesize proteins that will secreted from cells. E.M: - Small dense granules. - 2 subunits. - Polysomes :rosettes attached to mRNA. EM picture of polyribosomes which is a group of ribosomes (spiral or rosette form) connected by mRNA, they also called polysomes. System of membranous tubules communicating with each other. Network of smooth anatomizing tubules. EM picture of Smooth endoplasmic reticulum (SER) Smooth (agranular) endoplasmic reticulum (SER) without attached ribosomes. E M picture of multiple mitochondria and SER EM picture of mitochondria showing: 1. Outer mitochondrial membrane. 2. Inner mitochondrial membrane 3. Cristae. 4. Matrix, 5. Dense granules EM picture of: (1) SER (3) Ribosomes (2) Multiple mitochondria Network of membranous tubules, vesicles, flattened sacs (cisternae) covered with ribosomes EM picture of rough endoplasmic reticulum (RER)   Rough (granular) endoplasmic reticulum (RER) with attached ribosomes. Polyribosomes (→) L Em of: 1- Single mitochondrion with many cristae (C) and dense granules (D) 2- RER 3- Secondary lysosomes (L) EM picture of single mitochondrion & RER and lipid droplet EM picture of multiple mitochondria & RER & glycogen granules