CELL AND ORGANELLES, cell wall . Take a look at description below also

mahnoorbaig11301 101 views 9 slides Jan 16, 2024
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About This Presentation

Mitochondria: These are the powerhouses of the cell, generating energy (ATP) through respiration.

Ribosomes: These are the protein factories, translating genetic instructions into proteins, the building blocks and tools of the cell.

Endoplasmic reticulum (ER): This intricate network acts as a tran...


Slide Content

CELL AND ORGANELLES Conceptual explanation by Smart Brains Lecture 1

What is Cell? Cell from Latin word “Cellula” means small room is the structural and functional unit of living organisms. Discovered by Robert Hooke in 1665. Cytology: Cyto means cell & logy is for study. Components of cell: Cytoplasm Organelles ( endoplasmic reticulum, mitochondria, Golgi bodies etc. Walls ( Cell wall and cell membrane) DNA (Hereditary material)

Cell Theory: Botanist Scheildon (1838) & Zoologist Schwann (1839). Main Points: All living organism are made up of 1 or more than 1 cells. Cell is the structural & functional unit of all living organisms. New cell arises from Pre-existing cells. Cell wall: Outer most boundary of plant cell and absent in animal cell. Discovery: By Robert Hooke (1665)

Cell wall: Outer most boundary of plant cell and absent in animal cell. Discovery: By Robert Hooke (1665) Chemical composition: Plant cell wall is made up of cellulose, cemented by pectin and lignin. Fungi’s cell wall is made up of chitin Prokaryote’s cell wall made up of murein Structure of cell wall: It is made up of 3 layers.

Primary wall: (1-3 Mainly composed of cellulose and some deposition of pectin(heteropolysaccaride, complex starch) and lignin(second most abundant polymer after cellulose). Secondary Wall: (5-10 thick) Formed in inner surface of primary wall & present in the hard woody portion of plant. Composed of cellulose, lignin, inorganic salt, silica and waxes. Middle Lamella: (1 thick) Formed between 2 primary walls of 2 adjacent cells.  

FUNCTIONS OF CELL WALL: Provides definite shape to cell and make plant body rigid. Protect cell from osmotic lysis. Hydrophilic and imbibe (absorb) nature allow water and solute molecules movement.

Animal Cell: