this is 1st yea chapter 1 topic about cell structure and function of class 11
CELL BASIC STRUCTURE AND FUNCTION IS VERY IMPORTANT TOPIC FOR 1ST YEAR STUDENTS OF BIOLOGY ITS 1ST CHAPTER TOPIC
CELL BASIC STRUCTURE AND FUNCTION DIAGRAM
WHAT IS CELL ?
DISCOVERY OF CELL
Cell Biology is the study of cells from their fundamental structure to the function of each cell organelle of living organism. The first Biologist, legend scientist Robert Hooke, discovered cells.
All organisms are composed of cells, which may be single cells (unicellular) or multicellular (mycoplasmas).
Cells are the building block of all living things. They provide the structure of the body and convert nutrients taken from food into energy.
Cells are complex and their parts perform various functions in the organism. They come in various shapes and sizes, similar to the bricks of the building. Our body is composed of cells of various shapes and sizes. Cells are the lowest degree of organisation in all life forms. The number of cells in an organism may vary from organism to organism. Humans have more cells than bacteriA.
Biology Book Class 11 Chapter 1 Cell structure And Function biology study of cell called Cytology Discovered by Robert Hooke First cell Cork is Cell is Book in 1665 discovered in cork cell of Plant (cork oak) empty only boundary (Cell wall) name is Microphagia
CELL WALL AND ITS BASIC CHARACTERISTICS
-
- Outermost boundary of Plant, Fungi, Bacteria and Some protists.
-
- Animal cell has no cell wall.
-
- Young plant cell (Meristematic cell) cell wall. has no
-
- Cell wall in 1665 Was discovered by Robert before other parts. Hooke
100
-
- Cell wall made by secretion of cell.
B. Cell wall is dead part of cell
-
- Cell wall Composition
Plant Cellulose
Fungi Chitin (Protein + Carbohydrates)
Bacteria Murein (Protein + Lipid)
-
- Cell wall is rigid, permeable
Pectin is polymer of around 200 galactorunic acid molecules
nag-majority (COOCH3)
polimer around glactorunic acid
Pectic acid
-
- Branched cellulose is called hemicellulase
-
- hayers of cell wall
Middle lamellae (1 lm thick)
Fell wall
Biology Book Class 11 | Chapter 1 Cell Structure And Function
PLEASE WATCH THE VIDEO CAREFULLY WITH ATTENTION TO UNDERSTAND THE THE WHOLE TOPIC MORE EASILY WITH ILLUSTRATIONS
One of the most significant discoveries
in science is the discovery of cells. This discovery allows us to understand that all living things are composed of cells. Cells play a vital role in the execution of life processes. Understanding the structure and function of cells has enabled us to gain a better understanding of life.
CELL BASIC STRUCTURE AND FUNCTION VIDEO TUTORIAL
Primary wall (1-3um thick): First wall formed Secondary wall (5-10 Mom thick) in developing cell
11. Secondary wall contain minerals & more support. Nitrocellulose is explosive provide
12. FUNCTIONS L↳ Present in Sclerenchyma cell
*Shape, Support & Protection to cell
* Prevent cell from bursting (Bacteria)
Primary wall middle e tamella
*Help in water absorption
SOME IMPORTANT MCQS
TO UNDERSTAND MORE IN A BETTER WAY CELL BASIC STRUCTURE AND FUNCYIONS NOW IT IS IMPORTANTG TO SOLVE SOME QUESTIONS
CONFRONTING THE NEED OF UNDERSTANDING
SOME MCQS BASED TEST ARE GIVEN BELOW
Cellophane is Partialy Permeable membrane
1. The secretion which made cell wall made by
(0) Lysosome (n) Peroxysome Galigi bodies (d) All
2. The cell wall of mycoplasma is made of
(a) Chitin
(6) Murein
(c) Cellulose
(d) Nove
Pecting
Rayan is Textile fiber 2
3. What is thickness of primary wall in root tip cell?
(a) 1µm
(b) 1-3µm
(c)5-10um
(None
4. Cell wall of fungi & plant inis similar in
(a) Thickness
(6) Composition
() Function
(d) All
CYTOPLASM
1. The viscous fluid blw plasma membrane
8 nuclear membrane.
2. The living contents of cell is called protoplasm.
3. Protoplasm = Nucleus + Cytoplasm (90% water)
4. The biggest egg ostrich egg (1Kg) in the world is
5. COMPOSITION
AL biomolecules
by wall mainy contain
Magnification of cell
This below video has more deeply explained the magnification of cell and deeply explained this is lec 2 which is also available on youtube
Table of Contents
FREQUENTLY ASKED QUESTIONS
Q. What is the basic structure and function of a cell?
1 thought on “Biology Book Class 11 | Chapter 1 Cell Structure And Function”