3. INTRODUCTION
• Cell is the structural and functional unit of an
organism
• Cells are made of several types of micromolecules
and macromolecules
• Plant body is made up of different kinds of cells
6. The outermost non-living boundary of plants is
known as the cell wall
The various components of a cell are seen enclosed
in an outer covering called plasma membrane
All the components within the plasma membrane
are collectively called protoplasm
The components other than the nucleus in the
protoplasm are called cytoplasm
7. The components that are seen in the cytoplasm that
performs various physiological activities are called
the cell organelles
Nucleus – Controlling centre of all vital activities in
the cell
Endoplasmic reticulum -The membrane system
which extends from the plasma membrane to the
nuclear membrane
Golgi complex – A system of membrane-bound
secretory structures
8. Ribosome -Small spherical bodies made up of RNA
and protein
Mitochondria – Spherical or granular bodies seen in
the cytoplasm
Chloroplast – The green plastids seen in cytoplasm
Vacuole – Sap-filled vesicles in the cytoplasm
9. Nucleus –Control all vital activities in the cell
Endoplasmic reticulum –Acts as a pathway for the
movement of substances
Golgi complex –Production of various cellular
secretions
Ribosome –Synthesis protein molecules
Mitochondria –Production and storage of energy
Chloroplast -Photosynthesis
Vacuole –Maintaining the turgidity of plant cells
10. Cells are made of several types of micromolecules
and macromolecules. The molecular level of
organisation explains that these molecules are
arranged and assembled into subcellular
components of the cells.
