WELCOME RAYAT SHIKSHAN SANSTHAS VITA HIGHSCHOOL VITA SUBJECT
WELCOME
RAYAT SHIKSHAN SANSTHAS VITA HIGHSCHOOL VITA
SUBJECT
SUBJECT TEACHER SMT. MULLA M. A.
t h STD-9
CELL: THE UNIT OF LIFE
Structural Organization Of A cell • Plant Cell
Cell Organelles A) Nucleus: - Nucleus is a large spherical body generally lying at the centre of a cell. It controls all the cellular activities.
B) Endoplasmic Reticulum(ER)
Two Types- 1)Rough Endoplasmic Retieculum-It has particles called ribosomes attached to it. 2)Smoth Endoplasmic Retieculum. SER is without ribosomes.
C) Golgi Apparatus It comprises of five to eight sacs which resemble deflated balloons placed aprox. parallel to each other
D) Lysosomes: Lysosomes digest the waste. Lysosomes are simple one membrane bound sacs , filled with digestive enzymes.
E) Mitochondria It is a power house of the cell. Mitochondria produces the energy for the cell. Plant cells have fewer Mitochondria.
F) Plastids are double membrane structures present only in plant cells. There are of two types 1 -Chromoplasts. Chloroplasts are a type off a choromoplasts which are green in color dur to chlorophyll. 2 -Leucoplasts-white or colorless plastids.
G) Vacuoles These are storage sacs for solid or liquid contents. The structure of the vacuoles changes according to the need of the cell. It is one layered.
- Slides: 16