Class 9 cell ppt 4
- 1. LEARNING OBJECTIVES -- VIDEO 4 • GOLGI APPARATUS • LYSOSOMES • MITOCHONDIA • PLASTIDS • VACOULES • CELL DIVISION • ORGANELLES IN PLANT AND ANIMAL CELL
- 2. GOLGI APPARATUS • Golgi apparatus was first discovered by Camillo Golgi . • This is also called post office of cell. • This consist of membrane bound sacs that are arranged parallel to each other in stacks which is called Cisterns • . These are connected with membranes of ER • FUNCTIONS:. • Golgi apparatus pack and transport the proteins across the cytoplasm. • Its functions include storage , modification and packaging . • These also form lysosomes .
- 3. LYSOSOMES • These are membrane bound . • They are referred to as suicide bags of the cell as they contain potent enzymes that can digest a cell. • Lysosome also help in defense by attacking a foreign object. • These are made by rough ER . • We can say it is type of waste disposal system in cell . • When the cell gets damaged , lysosomes may burst and enzymes digest their own cell . • These are also called Suicide Bags of cell .
- 4. MITOCHONDRIA • These are powerhouse of cell . • It has two membranes . • The inner membrane is deeply folded and outer membrane is porous . • Mitochondria generate ATP(Adenosine tri phosphate) which is a form of energy . • The inner foldings of Mitochondria increase surface area for ATP generation. • Mitochondria has its own DNA and ribosomes and hence they make their own proteins . • FUNCTIONS: .It is the main seat for cell respiration and oxidation of food.
- 5. PLASTIDS • Plastid is present only in plant cell . These are of three types . Plastids also have its own DNA and ribosomes . • FUNCTIONS: • Chloroplast trap the solar energy for photosynthesis. • Chromoplasts give colour to flowers . • Leucoplasts store food in the form of starch.
- 6. VACUOLES • These are the storage sacs . • There are large vacuoles in plant cell but in animal cell they are very small sized . • These in plant cell occupies 50-90% volume . • These provide rigidity to cell . • Vacuoles include amino acids , sugars and proteins in it . • This help cell to perform respiration , clearing the waste or to make new proteins .
- 7. CELL INCLUSIONS • Cell inclusions are non living materials present in the cytoplasm . • The common ones are stored food, secretions, excretions etc.
- 8. CELL DIVISION • Cells are formed to grow and replace old and dead cells . • Cell Division is process by which new cells are formed . • These are of two types Mitosis and Meiosis . • In mitosis mother cell divides to form two identical daughter cells . The daughter cell have same number of chromosomes as mother cell . It helps in growth . • Cells of reproductive organs divide to form gametes , which after fertilization give rise to offspring . This is Meiosis . • When meiosis happens four new cells are formed . New cells are half the number of chromosomes than of mother .
- 9. ORGANELLES IN PLANT CELL
- 10. ORGANELLES IN ANIMAL CELL
- 11. DIFFERENCE BETWEEN PLANT AND ANIMAL CELL
- 12. SUMMARY • ORGANELLES IN CELL • GOLGI APPARATUS • LYSOSOMES • MITOCHONDRIA • PLASTIDS • VACUOLES