Non-membranous Organelles

Describe the nonmembranous organelles of a typical cell with their structure and specific functions.
Summarize the process of protein synthesis.

Presaented by-
Dr. Subarna Das
Resident, Dept. of Anatomy, BSMMU

Guided by-
Dr. Zinnat Ara Yasmin
Asst. Prof, Dept. of Anatomy, BSMMU

1. Non-membranous Organelles Presaented by- Dr. Subarna Das Resident, Dept. of Anatomy, BSMMU Guided by- Dr. Zinnat Ara Yasmin Asst. Prof, Dept. of Anatomy, BSMMU

2. Objectives Describe the nonmembranous organelles of a typical cell with their structure and specific functions. Summarize the process of protein synthesis.

3. Cell Organelles Organelle = “little organ”

4. Non-membranous Organelles 1.Ribosomes 2.Centrioles 3.Cytoskeletons- Microfilaments Intermediate filaments Microtubules 4.Proteasomes

5. Ribosome Site of protein synthesis Found attached to rough ER or floating free in cytosol Produced in a part of the nucleus called the nucleolus

6. Types of Ribosomes Ribosome

7. Free Ribosome Polysome Types Ribosome

8. Synthesis of Protein Ribosome

9. Synthesis of Protein Ribosome

10. Proteasomes

11. Proteasomes

12. Structure of proteasomes Proteasomes a c

13. Proteasomes

14. Cytoskeleton

15. Microfilaments, Microtubules form “Skeleton” of the cell Cytoskeleton

16. Microtubules Microfilaments (Actin Filaments) Intermediate Filaments Structure of Cytoskeleton Cytoskeleton

17. Cytoskeleton

18. Microfilaments Cytoskeleton

19. Structure of Microfilament Cytoskeleton

20. Function of Microfilament Cytoskeleton

21. Cytoskeleton

22. Function of Microfilament Cytoskeleton

23. Function of Microfilament Cytoskeleton

24. Function of Microfilament Cytoskeleton

25. Intermediate Filament Cytoskeleton

26. Is similar to Anchor Intermediate Filament Cytoskeleton

27. Microtubules Cytoskeleton

28. analogy a microtubule is similar to railroad tracks Microtubules Cytoskeleton

29. The flagella and cilia are composed of microtubules Microtubules Cytoskeleton

30. Cilia & Flagella Structure Bundles of microtubules With plasma membrane Microtubules Cytoskeleton

31. Microtubules Cytoskeleton

32. Microtubules Cytoskeleton

33. Microtubules Cytoskeleton

34. Microtubules Cytoskeleton

35. Examples of cytoskeletal pathologies Immotile cilia syndrome (Kartagener’s synd.) Bronchiectasis Decreased sperm motility Sterility Neurofibrilary tangle Alzheimer’s disease Desminopathy Cytoskeleton

36. Centriole Aids in cell division Usually found only in animal cells Made of microtubules

37. Fig. 6-22 Centrosome Microtubule Centrioles 0.25 µm Longitudinal section of one centriole Microtubules Cross section of the other centriole Centriole

38. Structure of Centriole Centriole

39. Structure of Centriole Centriole

40. Centrioles in cell division Centriole