Understanding the importance of special structures in a cell!

1. Role of Cell
Organelles
Prepared by
Kalsoom
Muhammad
Saleem

2. Cell Organelle
An organelle is a membrane-bound
structure that carries out specific
activities for the cell.

3. Cell Organelles
 Nucleus
 Nucleoli
 Mitochondria
 Ribosomes
 Endoplasmic Reticulum
 Smooth Endoplasmic Reticulum
 Rough Endoplasmic Reticulum
 Golgi Apparatus (Golgi body or Golgi Complex)
 Lysosomes
 Peroxisomes
 Secretory Vesicles
 Cell Cytoskeleton

4. Nucleus
 Control centre of
cell containing DNA
code in
chromosomes
 Genes (DNA) control
and promote
reproduction of cell

5. Nucleoli
 Staining structures
present in nucleus
 Site of
transcription
 Assembles
ribosomes

6. Mitochondria
 Power house of cell
 Contains oxidative
enzymes on shelves
and dissolved
enzymes in matrix
that work in
association with
each other to produce
ATP
 Contains DNA and
are self-replicating

7. Ribosomes
 Composed of
mixtures of RNA
and proteins
 They function in
protein synthesis

8. Endoplasmic Reticulum
 Substances
produced in some
parts of cell entre
ER and are
transported to
other parts of cell
 Machinery for
major share of
metabolic
functions

9. Smooth Endoplasmic Reticulum
 Synthesis of lipid
substances
 Other processes of
cells promoted by
reticular enzymes

10. Rough Endoplasmic Reticulum
 Synthesis and
packaging of
proteins by
process of protein
generation, folding,
transport and
protein quality
check

11. Golgi Apparatus
 Transport vesicles are
pinched off from ER
and attach to Golgi
Apparatus
 Processed and
converted into
lysosomes, secretory
vesicles and other
cytoplasmic
components in Golgi
Apparatus

12. Lysosomes
 Provided with
intracellular digestive
system that allows cell
to digest
 Damaged cellular
structures
 Food particles that
have been ingested by
cell
 Unwanted matter
 Hydrolase enzyme
hydrolysis organic
compounds

13. Peroxisomes
 Oxidases combine
Oxygen with
Hydrogen and form
Hydrogen peroxide
which with
catalase (enzyme)
oxidise many
substances which
are otherwise
poisonous

14. Secretory Vesicles
 Store protein proenzymes that are
secreted into pancreatic duct and
then to duodenum, where they digest
food

15. Cell Cytoskeleton
 Made up of
filaments and
microtubules
 Filaments provide
elastic support to
cell membrane
 Microtubules provide
rigid physical
structures for cell

16. Questions are guaranteed in life, answers aren't…..!!!

17. Thank
You