✓just refer to attachment for the question.
•need all the answers not just 1
( nd spammers pls keep ur stinky as(s) out of this question!!!!!!)
Answers
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Examination Hall,
Faridabad City, Haryana .
December 08.20……..
The turning party will visit Agra, Jaipur and Mumbai. I shall have to pay Rs. 750
In all. Such trips add a great deal to our knowledge. They give us practical lessons. They also provide fun and amusement
add the preferred place you want
jai siya ram☺ __/\__
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TANVI IS THE MOST BRILLIANT STUDENT IN CLASS
HE IS GREATEST OF ALL LEADERS
JUPITER IS LARGER PLANET
Structure
Structurally, it consists of a phospholipid bilayer along with two types of proteins viz. embedded proteins and peripheral proteins that function in providing shape and allowing the movement of particles in and out of the cell.
The most abundant lipid which is present in the cell membrane is a phospholipid which contains a polar head group attached to two hydrophobic fatty acid tails.
The embedded proteins act as channels for the transfer of particles across the cell with some proteins acting as receptors for the binding of various components.
The peripheral proteins function as to provide fluidity as well as mechanical support to the structure of the cell.
Plasma membrane (Cell membrane) Diagram
Functions
The cell membrane provides mechanical support that facilities the shape of the cell while enclosing the cell and its components from the external environment.
It regulates what can be allowed to enter and exit the cell through channels, acting as a semi-permeable membrane, which facilities the exchange of essential compounds required for the survival of the cell.
It generates and distributes signals in and outside of the cell for the proper functioning of the cell and all the organelles.
It allows the interaction between cells required during tissue formation and cell fusion.
Cell Wall
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.
Structure
In a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.
A cell wall is multilayered with a middle lamina, a primary cell wall, and a secondary cell wall.
Middle lamina contains polysaccharides that provide adhesion and allows binding of the cells to one another.
After middle lamina is the primary cell wall which is composed of cellulose. The last layer, which is not always present, is the secondary cell wall made of cellulose and hemicellulose.
Cell Wall (Plant, Fungal, Bacterial)
Functions
The critical function of the cell wall is protecting and maintaining the shape of the cell. It also helps the cell withstand the turgor pressure of the cell.
It initiates cell division by providing signals to the cell and allows the passage of some molecules into the cell while blocking others.
Centriole
Centrioles are tubular structures mostly found in eukaryotic cells which are composed mainly of the protein tubulin.
Structure
A centriole consists of a cylindrical structure made with nine triplets microtubules that surround the periphery of the centriole while the center has a Y-shaped linker and a barrel-like structure that stabilizes the centriole.
Another structure called cartwheel is present in a centriole which is made up of a central hub with nine spokes/filaments radiating from it. Each of these filaments/spokes is connected to the microtubules through a pinhead.
Centrioles Diagram
Functions
During cell division, centrioles have a crucial role in forming spindle fibers which assist the movement of chromatids towards their respective sides.
They are involved in the formation of cilia and flagella.